Some regions (mainly Russia and Belarus) were not allowed to play the game (not a decision made by Steam) and then some players used VPN and were banned for that (by Steam).
This seems like an arbitrary 'moral' choice, an honestly after the bs we've seen from Israel and the U.S, they have no moral high ground to stand on and criticize the Russians. Losing all your games is a massive issue, they are effectively holding your games hostage in an effort to exert politically motivated influence.