diff --git a/src/core/hle/service/acc/acc.cpp b/src/core/hle/service/acc/acc.cpp
index 9420c7d7d..8efc6ea3d 100644
--- a/src/core/hle/service/acc/acc.cpp
+++ b/src/core/hle/service/acc/acc.cpp
@@ -570,6 +570,44 @@ protected:
     }
 };
 
+class AuthenticateApplicationAsyncInterface final : public IAsyncContext {
+public:
+    explicit AuthenticateApplicationAsyncInterface(Core::System& system_) : IAsyncContext{system_} {
+        MarkComplete();
+    }
+    ~AuthenticateApplicationAsyncInterface() = default;
+
+protected:
+    bool IsComplete() const override {
+        return true;
+    }
+
+    void Cancel() override {}
+
+    Result GetResult() const override {
+        return ResultSuccess;
+    }
+};
+
+class CheckNetworkServiceAvailabilityAsyncInterface final : public IAsyncContext {
+public:
+    explicit CheckNetworkServiceAvailabilityAsyncInterface(Core::System& system_) : IAsyncContext{system_} {
+        MarkComplete();
+    }
+    ~CheckNetworkServiceAvailabilityAsyncInterface() = default;
+
+protected:
+    bool IsComplete() const override {
+        return true;
+    }
+
+    void Cancel() override {}
+
+    Result GetResult() const override {
+        return ResultSuccess;
+    }
+};
+
 class IManagerForApplication final : public ServiceFramework<IManagerForApplication> {
 public:
     explicit IManagerForApplication(Core::System& system_,
@@ -789,6 +827,20 @@ void Module::Interface::GetProfile(HLERequestContext& ctx) {
     rb.PushIpcInterface<IProfile>(system, user_id, *profile_manager);
 }
 
+void Module::Interface::GetProfileDigest(HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    Common::UUID user_id = rp.PopRaw<Common::UUID>();
+    LOG_DEBUG(Service_ACC, "called user_id=0x{}", user_id.RawString());
+
+    // Return a dummy digest for now
+    std::array<u8, 0x20> digest{};
+    std::fill(digest.begin(), digest.end(), static_cast<u8>(0));
+
+    ctx.WriteBuffer(digest);
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultSuccess);
+}
+
 void Module::Interface::IsUserRegistrationRequestPermitted(HLERequestContext& ctx) {
     LOG_WARNING(Service_ACC, "(STUBBED) called");
     IPC::ResponseBuilder rb{ctx, 3};
@@ -860,6 +912,22 @@ void Module::Interface::GetBaasAccountManagerForApplication(HLERequestContext& c
     rb.PushIpcInterface<IManagerForApplication>(system, profile_manager);
 }
 
+void Module::Interface::AuthenticateApplicationAsync(HLERequestContext& ctx) {
+    LOG_WARNING(Service_ACC, "(STUBBED) called");
+
+    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    rb.Push(ResultSuccess);
+    rb.PushIpcInterface<AuthenticateApplicationAsyncInterface>(system);
+}
+
+void Module::Interface::CheckNetworkServiceAvailabilityAsync(HLERequestContext& ctx) {
+    LOG_WARNING(Service_ACC, "(STUBBED) called");
+
+    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    rb.Push(ResultSuccess);
+    rb.PushIpcInterface<CheckNetworkServiceAvailabilityAsyncInterface>(system);
+}
+
 void Module::Interface::IsUserAccountSwitchLocked(HLERequestContext& ctx) {
     LOG_DEBUG(Service_ACC, "called");
     FileSys::NACP nacp;
@@ -960,6 +1028,42 @@ void Module::Interface::StoreSaveDataThumbnailApplication(HLERequestContext& ctx
     StoreSaveDataThumbnail(ctx, uuid, tid);
 }
 
+void Module::Interface::ClearSaveDataThumbnail(HLERequestContext& ctx) {
+    LOG_WARNING(Service_ACC, "(STUBBED) called");
+
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultSuccess);
+}
+
+void Module::Interface::CreateGuestLoginRequest(HLERequestContext& ctx) {
+    LOG_WARNING(Service_ACC, "(STUBBED) called");
+
+    // Create a dummy UUID for the guest login request
+    const Common::UUID dummy_uuid{};
+
+    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    rb.Push(ResultSuccess);
+    rb.PushIpcInterface<IGuestLoginRequest>(system, dummy_uuid);
+}
+
+void Module::Interface::LoadOpenContext(HLERequestContext& ctx) {
+    LOG_WARNING(Service_ACC, "(STUBBED) called");
+
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultSuccess);
+}
+
+void Module::Interface::DebugActivateOpenContextRetention(HLERequestContext& ctx) {
+    LOG_WARNING(Service_ACC, "(STUBBED) called");
+
+    // Create a dummy UUID for the session object
+    const Common::UUID dummy_uuid{};
+
+    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    rb.Push(ResultSuccess);
+    rb.PushIpcInterface<ISessionObject>(system, dummy_uuid);
+}
+
 void Module::Interface::GetBaasAccountManagerForSystemService(HLERequestContext& ctx) {
     IPC::RequestParser rp{ctx};
     const auto uuid = rp.PopRaw<Common::UUID>();
diff --git a/src/core/hle/service/acc/acc.h b/src/core/hle/service/acc/acc.h
index 0395229b4..9b116d2ca 100644
--- a/src/core/hle/service/acc/acc.h
+++ b/src/core/hle/service/acc/acc.h
@@ -1,4 +1,5 @@
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-FileCopyrightText: Copyright 2025 citron Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
@@ -26,9 +27,12 @@ public:
         void ListOpenUsers(HLERequestContext& ctx);
         void GetLastOpenedUser(HLERequestContext& ctx);
         void GetProfile(HLERequestContext& ctx);
+        void GetProfileDigest(HLERequestContext& ctx);
         void InitializeApplicationInfo(HLERequestContext& ctx);
         void InitializeApplicationInfoRestricted(HLERequestContext& ctx);
         void GetBaasAccountManagerForApplication(HLERequestContext& ctx);
+        void AuthenticateApplicationAsync(HLERequestContext& ctx);
+        void CheckNetworkServiceAvailabilityAsync(HLERequestContext& ctx);
         void IsUserRegistrationRequestPermitted(HLERequestContext& ctx);
         void TrySelectUserWithoutInteraction(HLERequestContext& ctx);
         void IsUserAccountSwitchLocked(HLERequestContext& ctx);
@@ -39,6 +43,10 @@ public:
         void ListQualifiedUsers(HLERequestContext& ctx);
         void ListOpenContextStoredUsers(HLERequestContext& ctx);
         void StoreSaveDataThumbnailApplication(HLERequestContext& ctx);
+        void ClearSaveDataThumbnail(HLERequestContext& ctx);
+        void CreateGuestLoginRequest(HLERequestContext& ctx);
+        void LoadOpenContext(HLERequestContext& ctx);
+        void DebugActivateOpenContextRetention(HLERequestContext& ctx);
         void GetBaasAccountManagerForSystemService(HLERequestContext& ctx);
         void StoreSaveDataThumbnailSystem(HLERequestContext& ctx);
 
diff --git a/src/core/hle/service/acc/acc_u0.cpp b/src/core/hle/service/acc/acc_u0.cpp
index 54844bfe7..177365809 100644
--- a/src/core/hle/service/acc/acc_u0.cpp
+++ b/src/core/hle/service/acc/acc_u0.cpp
@@ -1,4 +1,5 @@
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-FileCopyrightText: Copyright 2025 citron Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "core/hle/service/acc/acc_u0.h"
@@ -16,19 +17,20 @@ ACC_U0::ACC_U0(std::shared_ptr<Module> module_, std::shared_ptr<ProfileManager>
         {3, &ACC_U0::ListOpenUsers, "ListOpenUsers"},
         {4, &ACC_U0::GetLastOpenedUser, "GetLastOpenedUser"},
         {5, &ACC_U0::GetProfile, "GetProfile"},
-        {6, nullptr, "GetProfileDigest"}, // 3.0.0+
+        {6, &ACC_U0::GetProfileDigest, "GetProfileDigest"}, // 3.0.0+
         {50, &ACC_U0::IsUserRegistrationRequestPermitted, "IsUserRegistrationRequestPermitted"},
-        {51, &ACC_U0::TrySelectUserWithoutInteraction, "TrySelectUserWithoutInteraction"},
+        {51, &ACC_U0::TrySelectUserWithoutInteraction, "TrySelectUserWithoutInteractionDeprecated"}, // [1.0.0-18.1.0]
+        {52, &ACC_U0::TrySelectUserWithoutInteraction, "TrySelectUserWithoutInteraction"}, // [19.0.0+] DEPRECATED
         {60, &ACC_U0::ListOpenContextStoredUsers, "ListOpenContextStoredUsers"}, // 5.0.0 - 5.1.0
-        {99, nullptr, "DebugActivateOpenContextRetention"}, // 6.0.0+
+        {99, &ACC_U0::DebugActivateOpenContextRetention, "DebugActivateOpenContextRetention"}, // 6.0.0+
         {100, &ACC_U0::InitializeApplicationInfo, "InitializeApplicationInfo"},
         {101, &ACC_U0::GetBaasAccountManagerForApplication, "GetBaasAccountManagerForApplication"},
-        {102, nullptr, "AuthenticateApplicationAsync"},
-        {103, nullptr, "CheckNetworkServiceAvailabilityAsync"}, // 4.0.0+
+        {102, &ACC_U0::AuthenticateApplicationAsync, "AuthenticateApplicationAsync"},
+        {103, &ACC_U0::CheckNetworkServiceAvailabilityAsync, "CheckNetworkServiceAvailabilityAsync"}, // 4.0.0+
         {110, &ACC_U0::StoreSaveDataThumbnailApplication, "StoreSaveDataThumbnail"},
-        {111, nullptr, "ClearSaveDataThumbnail"},
-        {120, nullptr, "CreateGuestLoginRequest"},
-        {130, nullptr, "LoadOpenContext"}, // 5.0.0+
+        {111, &ACC_U0::ClearSaveDataThumbnail, "ClearSaveDataThumbnail"},
+        {120, &ACC_U0::CreateGuestLoginRequest, "CreateGuestLoginRequest"},
+        {130, &ACC_U0::LoadOpenContext, "LoadOpenContext"}, // 5.0.0+
         {131, &ACC_U0::ListOpenContextStoredUsers, "ListOpenContextStoredUsers"}, // 6.0.0+
         {140, &ACC_U0::InitializeApplicationInfoRestricted, "InitializeApplicationInfoRestricted"}, // 6.0.0+
         {141, &ACC_U0::ListQualifiedUsers, "ListQualifiedUsers"}, // 6.0.0+