Isn't it too late for that right now, though? As of right now, if Russia stops fighting, there will be no fighting; if Ukraine stops fighting, there will be no Ukraine, as we know it.
“Isn’t it too late for that right now, though?”
Nope. All it takes is for the US to back off, let Ukraine back off, and Russia backs off.
It is never too late to sue/negotiate for peace.