Four belonging to 92 OMBr were shown in the 2021 Independence Day parade, at least one was verified destroyed in Kharkiv by artillery back in March at the tank training school.
In 2021 it was reported that a full company of T-64BM2s was to be created (which would be 13 tanks including the company commander tank), but no idea how far they got with that before the war. It's the most capable tank in the Ukrainian army besides the Oplot-M (which never really entered full service).