Perhaps they want to get an idea of everyone's condition before they assign out spots to group skaters together? But they also may be waiting to hear in regards to COVID, Canada and France both cancelled their GPs last year, Russian Fed might be wanting to hear from the ISU about contingencies before they assign events out - imagine Valieva (who we all pretty much consider a favorite for the Olympic team at this point) gets assigned an event and that event gets cancelled and then she not only misses out an international senior event but the GPF.
I saw somewhere on here that Canada is only allowing visitors with Canadian approved vaccines which doesn't include the Russian vaccine or something like that, so I it wouldn't surprise me if the Feds might be delaying their teams to get word from the ISU about the contingencies for events and if the ISU is making any agreements with government bodies about covid protocols with quarantining or vaccines, etc.