Yes, though the closure of dollar clearance services by US and UK banks also stopped the large important payments, at least via the West.

There will still be some facility to do it via China, but China's largest banks are also baulking (mostly because of the rapidly imploding value of the Ruble meaning they don't trust Russian banks to actually send the requisite funds than any great moral imperative I expect by the result is the same), and any Chinese services still willing to co-operate are going to extract a very, very hefty tithe from the Russians to enable it.