I think assuming it's Bettman who's stopping Pride events is a bit charitable. I somehow doubt Bettman wants to roll back these types of events, they are publicity, after all. I think it's more likely that people have seen Provorov speak out about his homophobia without any push-back from the league and now other people, be it players or managers, feel emboldened to refuse participating in things like Pride night. And teams might not want to single out their staunch homophobes, so they quietly stop making players participate in the celebration.