I don’t believe that the EU or Ukraine have approved Russia and US meeting together without them (Europe and Ukraine) being present.
The calls and meetings will be separate until a framework for the Easter ceasefire is agreed upon.
Norks were withdrawn from Kursk as a Trump precondition for talks.
This would be like the (peace-in-our-time) meeting with Hitler where Czechoslovakia wasn’t invited. Regardless of where someone stands on the war this won’t be a good look for Trump.