I totally get where you’re coming from, having spent quite some time dealing with Samsung device quirks myself. Samsung doesn’t currently offer a direct One UI emulator image for Android Studio, so the Remote Test Lab remains their primary solution. It’s a practical alternative, but as you probably noticed, it doesn’t give you the same immediacy or local control that a dedicated emulator would.
Beyond Genymotion and standard Android emulators with custom skins, none truly capture the One UI experience especially system-level features like your clipboard toast notification that are tightly coupled with Samsung’s software layer. For comprehensive Samsung-specific testing, nothing beats physical devices. Also, it’s worth diving into Samsung’s developer forums and resources where sometimes community members share creative workarounds or device farm options. For now, combining the Remote Test Lab with a few real devices is your best bet for reliable Samsung-specific testing.