What concerns exist about US-Russia talks on Ukraine without Ukrainian representation?

The direct talks between US and Russia regarding Ukraine have raised significant concerns, particularly given President Zelensky's reservations about meetings held without Ukrainian officials present. The primary worry is about the legitimacy of any agreements reached without Ukraine's input in discussions that directly impact their sovereignty and security. Though the direct communication channel between Russia and the US is notable, questions remain about what can realistically be achieved when the nation at the center of the conflict isn't at the negotiating table. This arrangement has fueled fears that discussions might lead to compromises favoring Russia's territorial ambitions without adequately addressing Ukraine's security needs.