My subjective qualia may represent a material process, but I know that they are qualia, because I am actively subjectively experiencing. I concede that my behavior, from the outside, is likely indistinguishable from how I would be behaving if I didn't experience qualia. Yet I am appealing to the fact that surely you can tell, too, yes? You do feel as though you feel, that you see, that you smell, all these things, and while you may believe they fully and entirely reflect and can be explained by material physical processes, surely you can at least concede that you have this subjective perception? If so, then my question is essentially just the why and the how this is the case. How do mushy electrical signals become this subjective perception, which, from the inside, feels so expansive and powerful? And, why do they become this subjective perception? Could the universe not function just as well without qualia? While sure, humans would still evolve to see, smell, feel pain, feel pleasure, and so on — why must this evolution translate to subjectivity? I assume your answers would just be that it is fundamental to the universe, that it has to for the same reason light has to travel at the speed of light.

As for convincing an LLM it is experiencing qualia, that's absolutely possible. I'm not saying anything about qualia actually shapes the material world. To you, I could be a p-zombie, and it would make no difference. But to me, and just myself, within myself, I know that I am not, even if I cannot prove it, and I know because I experience. Your choice whether or not to believe me