I have seen only one falsifiable test for if a mind actually has subjective conscious experience rather than just saying it does, and even that wasn't one which we can apply to humans or other animals, only AI, which means it will still be an open question if that test ever passes.

Saying "it is" or "it isn't" at this point is like early sci-fi speculations about the inhabitants of the Moon, Mars, and Venus — we know our own experience of qualia, but we don't understand how and why we got it, so we don't know what to look for in animals, let alone AI.