How concerned should President Zelensky be about the US-Russia negotiations regarding Ukraine?

According to Gabriel Narona, Zelensky should be deeply concerned as every detail emerging from these negotiations represents a life-or-death situation for the Ukrainian people. The stakes are extraordinarily high for Ukraine's population, who view the outcome as existential. Despite these concerns, Narona emphasizes that Zelensky ultimately holds a crucial position of authority, as any agreement would require his approval. This is because Ukrainian forces are the ones who must agree to cease hostilities against Russian forces. This highlights the precarious balance Zelensky faces - legitimate concerns about negotiations happening around Ukraine while maintaining final decision-making power on implementation.