I did see the German police with assault rifles during a protest when I lived in Frankfurt. They may have just been rubber bullets or not loaded etc. I never stopped to ask because it was a little scary coming from a country where you just don't see guns.
That being said, I have no idea about how they police football games, so you may well be right!
I have airpods and an android phone. They work well now (I really am not interested in spatial audio). They did however work pretty badly until I connected them to an iphone to allow the firmware to update. I dislike the ecosystem argument. They are just Bluetooth earphones... Quite expensive ones at that.