Ukraine and their backers aren’t capable of agreeing to this, they’re just too deep in the fantasy. The only reason I can think of for making this declaration again, which is really just a call for Ukraine to recognize the current reality of the situation, is for posterity.
A last off ramp before the Russians commit more and then demand more for resolution. It could only be a matter of time before Russia insists on Kharkiv oblast as a response to the terror bombing of civilians in Belgorod.
When the brainworms get tangled into a special and unique bundle.