The interesting wrinkle there is that Met. Hilarion of Budapest (formerly of Volokolamsk, a titular see belonging to the head of the Department on External Church Relations), is one of the biggest opponents of the Ukraine War in the Church in Russia and was demoted principally for questioning the regime narrative. He also is, as your CruxNow article indicates, pretty liberal on ecumenical relations and has been open to some rather bespoke concepts in that realm, e.g. reconciling with OOs while not requiring them to agree to Chalcedon. He's about as close as you can get to a genuine liberal bishop in that part of the world and if even he thinks that Fiducia Supplicans is a dealbreaker, it portends ill for developing positive relations with any of the local churches in the East.
