I agree that it’s not ideal to be hosted on a platform controlled by Microsoft, but it’s just a fact that you lose 90+% of contributors if you are anywhere else (there’s an article where someone compared, can’t find it right now). It’s not great that that’s how it is, but you need to choose your battles.
I’m not really very concerned, since git itself is decentralized, and if Github starts causing visible problems moving somewhere else is not a huge problem. Also VPNs exist.