Last year the Orthodox for Russia members in Ukraine were around 4% and falling so they are a tiny percentage of the Orthodox in Ukraine.
In Russia isn’t the Orthodox religious stuff mostly theatrical and state-connected ceremonies and the Russians themselves don’t actually go to church while the eager Christians who aren’t Orthodox are persecuted and harassed?
The numbers I see are that Ukraine is far more religious than Russia.
Ukraine is tearing churches down while the Russian government is using tax money to build them.
But, I wouldn't expect neocon scum to anything but back the side that is advancing the LGBT agenda.