is it possible UST recovered ?
Impossible. Dev has tried his best for UST to recover, he even spent hundreds of thousands of bitcoin dollars for all bitcoins to ensure UST remains stable but can't make it return to all prices until the supply of LUNA and the LUNA-UST protocol is stopped and it has been abandoned by dev. They're about to start LUNA v2 but as for the fate of UST I think it will really disappear from existence.
Another reason is that even when the CEO of Terra tries to cover UST, people continue to lose faith in the project he owns. I think, it is very difficult to recover. it's a stable coin, and very prone to crashing again once it's recovered, in fact, I think people prefer to use other stable coins over UST. so far the price is still under $0.1, and it proves that this is a stable coin that failed.