How concerned should Ukrainian President Volodymyr Zelensky be about the US-Russia talks?

Zelensky should be genuinely concerned as every detail from these negotiations is viewed as a matter of life or death by the Ukrainian people. However, his position is complicated by limited leverage - the war isn't progressing favorably for Ukraine, which will inevitably shape the peace agreement's terms. Despite these concerns, the United States is working closely with Ukraine through Special Envoy Kellogg, who coordinates with Ukraine while separate negotiators engage with Russia. Ultimately, any agreement requires Zelensky's approval, as Ukrainians must consent to ceasing hostilities alongside Russian forces.