The only problem with this is that Ukraine needs to be able to occupy Crimea ASAP if there’s a power change in Moscow.
Any new Russian leader is likely to sue for peace and try to get 2014 borders reinstated and blame everything on Putin, and if Crimea is still in Russian control then they’re likely to be allowed by the West to keep it, because let’s be honest no one cares when they occupied it 2014-2022. I know they’ve all promised Ukraine needs to be made entirely whole, but that’s very easy to say in the middle of a war when the end of conflict seems Mike’s away.
So I think Ukraine will pretty much stop operations hoping that the Russian army gets recalled to stop a civil war, with the exception of down south where they need to be able to strike Crimea within a few hours if needs be.