I think there’s a difference between law enforcement and police, though the word “enforcement” does stick in my craw a little. I don’t know if it’s what the OP was getting at, but there does need to be some way to ensure that people don’t abuse others even in an anarchist society.
That could be community intervention in the moment and social services in the long term, with cessation of community support as a last resort for people who simply will not cooperate with the community.
Of course, there would be a lot less crime in a supportive society, but it wouldn’t disappear entirely.