I thought that may have happened with Only Up!, but it may have only been temporally delisted for copyright violations by the developer.
Looks like it happens fairly often for bad G2A codes or other redeem code fraud, which seems fair. People report that you can get the money back as store credit.
RightHandOfIkaros@lemmy.world 1 day ago
Its a separate game. I have both CS GO and CS2 in my library as separate entries. You have to manually re-add CS GO because it was added as a new entry when CS2 replaced it though.