In the UK we have the Criminal Justice and Public Order Act 1994 section 60aa where the police are able to make anyone within an area remove a mask when a there is a large crowd and a senior cop decides to fill in the paperaorj. There has been a recent increase in its usage in the last 4-ish years.

Nassau County in NY state passed a law this summer https://www.nyclu.org/press-release/nassau-county-mask-ban-signed-into-law YES, there are exceptions for health, religious or cultural reasons BUT they've also used it as probable cause to search someone https://www.nbcnewyork.com/news/local/nassau-county-police-issue-first-face-mask-ban-violation/5741363/ (it doesn't matter that he was found with a knife. My son wears a mask because he thinks his nose is ugly)