How concerned should Volodymyr Zelensky of Ukraine be about the US-Russia negotiations?

Zelensky should be deeply concerned as every detail emerging from these negotiations represents life or death matters for the Ukrainian people. While he must ultimately approve any agreement to end hostilities, his lack of leverage significantly constrains his options. The war isn't progressing favorably for Ukraine, which will inevitably shape the contours of any peace agreement. Despite the United States working closely with Ukraine through Special Envoy Kellogg, Zelensky finds himself in a precarious position where his limited bargaining power may force difficult compromises in any potential settlement with Russia.