I have a few old posts on the subreddit and i need to view one of them as i am reviving an old project. there is a comment on one of them that has the info i need. I never screenshotted that info.
Make a GDPR request for all of your data. If they still have it, it'll be part of the dump. Expect to wait the full 30 days they're allowed before they give it to you.
Here's a quick way: become a scab mod for reddit. Get your thread and while you're at it scrape the sub to archive it, then lock it down again. They are reopening subs whenever they find replacement mods right now. I don't know if they would rely on you alone but chances are high.