Try googling your username and Reddit and see what is there (I found hundreds even though your profile was showing only two)
Just did that and holy shit there's a ton still left over. Is there another alternative that will delete properly cause my profile shows it's empty.
Edit: And to clarify, I didn't get my GDPR archive back yet despite putting in the request a few weeks ago, so dunno if I can use any of the tools that require the archive.