No, as a rule, but with a few exceptions. I have deleted maybe 10 comments and 1 post (and the post was sort of a test, it didn’t matter, I just wanted to see what happens when you get upvotes and delete the post - it was my kitten, and it sort of broke my post upvote count until I posted again, so useful information, same with comments, so idk how many I even have now).
I’m leaving my comments intact here because the platform needs that, and I am absolutely a team player, but I have drastically changed the way I interact so that’s an ok thing for me.
Eventually, when they get discovery sorted for small servers, I’ll make a secondary account on my own self-host server for more personal stuff, so I can have better control of my information. It just wasn’t something I bothered with on Reddit, I was a very small and largely insignificant part of Reddit.