Automoderator can be manually configured to perform actions on posts and comments that fit certain criteria, though as far as I know, it's not as extensive as, say, a bot that one would program themselves and tailor the needs of their own subreddit.

There is also the "approved users" feature [1], but it requires manual intervention for every particular user, and I am not sure whether it practically serves any purpose in public subreddits. Reddit claims it does, but when we tested it a few years ago, it did not work correctly. In any case, I do not recommend it for public subreddits with more than 1k daily users.

[1] https://mods.reddithelp.com/hc/en-us/articles/360009164452