I think people may need to wait. Here's what I've read and seen myself so far:
You can only edit/delete so many comments as it seems reddit only indexes the last 1000. After editing/deleting everything you can, you can see you still have unedited/undeleted comments by searching your username like: site:reddit.com "usernameHere"
. I saw plenty of comments going back years (I have a 14yr old account) that I wasn't able to touch.
The strategy seems to be to be requesting your data from reddit and then use the comment ids contained in that export to target them for edits/deletes via the API, assuming it's still usable for small scripts like the ones we want to use.
We're tracking our requested/received dates in this thread if you're interested in adding yours to the list.
That's exactly the same shit Elon/Twitter pulled with links to Mastodon.