It's too early in the development of AI technology to start asking questions about their self awareness and sentience. We don't yet have a reasonable model to explain even those of our own or other animals, let alone those of machines, for that matter. People are understandably very excited about LLMs given how much deductions they make. But in my very subjective personal experience, they don't show anything approaching sentience or self awareness. Their interactions are dry and devoid of the liveliness that human interactions exhibit. They have at best what can be described as a simplistic mechanical approximation of a personality - one that lacks the depth, nuisance and imperfections of a real human or animal personality. In my subjective assessment, the imminence of intelligence that can mimic biological intelligence is being extremely exaggerated and overhyped. It could possibly be decades away at best. The need for machine rights are equally far away.
The actual reason behind these demands, I believe, is to justify things that they do using these models. For example, didn't they argue that the fairuse policy applies to them while training on copyrighted materials without permission, because the training is not like other forms of digital reproduction? Imagine how far they can push this argument if AI sentience is recognized. It's just an extension of their greedy agenda.
Now going on a tangent, it's surprising that people have AI girlfriends and boyfriends. Trying to make an emotional connection with them is really off putting because of how unnatural they feel - even when we don't have the prior knowledge that it's an AI, and no matter how much they try to mimic a romantic human interaction. Dogs do an infinitely better job at making emotional connections with humans, without uttering a single word.