@joeo10 I haven't done much with link rot recently, no. At one time there was a function that would go and test every URL in the database and, if the page returned a 404, then a request would go out to the Internet Archive to see if there is a record for the link around the time of the post and, if so, the URL would be updated.
However, that was shut down five or six years ago after a discussion on here about the ethics of updating posts written by others automatically 🤔