What are the concerns about Ukraine's involvement in the US-Russia negotiations?

The clip highlights a significant diplomatic development where the US and Russia agreed to four broad principles for negotiations about the Ukraine war during talks held in Saudi Arabia. However, a major concern emerges regarding Ukraine's absence from these discussions. Ukrainian President Volodymyr Zelensky explicitly stated he wasn't invited to participate in these negotiations, raising questions about the role of both Ukraine and European nations in a peace process that directly impacts them. This absence is particularly troubling given that Ukraine is the primary victim of what many acknowledge as Russian aggression in the conflict, suggesting potential issues with negotiation strategies where key stakeholders appear to be sidelined.