Vulkan windows get the Vulkan GPU backend in the gpu renderer by default

src/render/gpu/SDL_render_gpu.c

@@ -1703,6 +1703,12 @@ static bool GPU_CreateRenderer(SDL_Renderer *renderer, SDL_Window *window, SDL_P
         SDL_SetBooleanProperty(create_props, SDL_PROP_GPU_DEVICE_CREATE_DEBUGMODE_BOOLEAN, debug);
         SDL_SetBooleanProperty(create_props, SDL_PROP_GPU_DEVICE_CREATE_PREFERLOWPOWER_BOOLEAN, lowpower);
 
+        // Vulkan windows get the Vulkan GPU backend by default
+        if (!SDL_HasProperty(create_props, SDL_PROP_GPU_DEVICE_CREATE_NAME_STRING) &&
+            (SDL_GetWindowFlags(window) & SDL_WINDOW_VULKAN)) {
+            SDL_SetStringProperty(create_props, SDL_PROP_GPU_DEVICE_CREATE_NAME_STRING, "vulkan");
+        }
+
         // Set hints for the greatest hardware compatibility
         // This property allows using the renderer on Intel Haswell and Broadwell GPUs.
         if (!SDL_HasProperty(create_props, SDL_PROP_GPU_DEVICE_CREATE_D3D12_ALLOW_FEWER_RESOURCE_SLOTS_BOOLEAN)) {