eh, i'd say there is/was BLM solidarity. Because Europe doesn't really have "black overpolicing" and because there were a few incidents of fan racism, the movement may have shifted or been hijacked.
Regardless of the reasons, it's still "political activism", so the point is moot since as far as I can tell, the IOC doesn't specify what activism they object to.
In Europe it was never about policing but the fans in the stands. Monkey chants, throwing bananas on the field, racist songs and even attacking players verbally on social media. The kneeling was not against the governments but the actions of the fans themselves.