I have noticed Ukraine stations operating on FT8 with some surprising frequency lately and have been confused by this given the previous announcement about a shutdown of amateur radio services in that country in the aftermath of the Russian invasion.

Some additional clarity on the matter from John Sweeney, K9EL and manager of the DX Marathon program:

Just a reminder that all Amateur Radio activity was suspended by the Ukraine government on February 24th, 2022. Recently some stations have been active on the air with Ukrainian callsigns – all operating from the Russian occupied areas of Ukraine and not approved by the Ukraine government. Only QSOs with Ukraine stations made before February 24th, 2022 will count for the 2022 DX Marathon. 73, John K9EL