diff --git a/android/jni/app-android.cpp b/android/jni/app-android.cpp
index 93c708ded5..5b317acfe9 100644
--- a/android/jni/app-android.cpp
+++ b/android/jni/app-android.cpp
@@ -593,8 +593,9 @@ static std::string QueryConfig(std::string_view query) {
 	} else if (query == "audioMixWithOthers") {
 		return g_Config.bAudioMixWithOthers ? "1" : "0";
 	} else if (query == "externalDisplayOutput") {
-		// Whether the game goes to a second display, see ExternalDisplayPresentation.java.
-		return g_Config.iGPUBackend == (int)GPUBackend::VULKAN && g_Config.iExternalDisplay == (int)ExternalDisplayMode::SHOW_GAME ? "1" : "0";
+		// Whether the game goes to a second display, see ExternalDisplayPresentation.java. The running backend: the
+		// setting is already the new one while the restart prompt for a change is up.
+		return GetGPUBackend() == GPUBackend::VULKAN && g_Config.iExternalDisplay == (int)ExternalDisplayMode::SHOW_GAME ? "1" : "0";
 	} else {
 		return "";
 	}
diff --git a/ios/ExternalDisplaySceneDelegate.mm b/ios/ExternalDisplaySceneDelegate.mm
index 6dcdea29b5..39711f4550 100644
--- a/ios/ExternalDisplaySceneDelegate.mm
+++ b/ios/ExternalDisplaySceneDelegate.mm
@@ -24,6 +24,7 @@
 #include "Common/System/NativeApp.h"
 #include "Core/Config.h"
 #include "Core/ConfigValues.h"
+#include "Core/System.h"
 
 static NSString *const PPSSPPExternalDisplayUpdateNotification = @"PPSSPPExternalDisplayUpdate";
 
@@ -116,7 +117,8 @@ static bool g_launched = false;
 		return;
 	}
 	// Without a window, iOS mirrors the phone.
-	if (g_Config.iGPUBackend != (int)GPUBackend::METAL && g_Config.iGPUBackend != (int)GPUBackend::VULKAN) {
+	// The running backend: the setting is already the new one while the restart prompt for a change is up.
+	if (GetGPUBackend() != GPUBackend::METAL && GetGPUBackend() != GPUBackend::VULKAN) {
 		INFO_LOG(Log::G3D, "External display: mirroring, as the backend can't present to it");
 		return;
 	}