There's zero incentive for Zelenskyy to agree to give up any territory today based on Russia's assurances it won't invade/America's assurances it'll back up the Ukraine considering both Russia and America respectively violated those obligations to the Budapest Memorandum back at the start of this conflict. Nothing has changed.
https://www.nytimes.com/2025/08/18/world/europe/putin-trump-zelensky-ukraine.html