I guess my question is just to what degree is there pushback against this in the Ukraine ?

No idea, there is no trustworthy info about it. Nothing major though, but i imagine country in which army is openly kidnapping and harassing people and where opposition is jailed or murdered by fascist mobs might have this supressed.

previously existing ukrainian orthodox church was far removed from Russia already

Doctrinally and thologically there is zero diferences, politically yes, although the schism was only in 2019, so you can see it's very recent development, i wouldn't be surprised to see US money in that, it wouldn't be even first time nor the 100th where orthodox church took US money for working against people.