You bet your ass there is. A small number of us are keeping the autism alive on Kbin.
Based on my limited GDPR experience at work, you can probably brute-force it this way:
Send your erasure request to redditdatarequests@reddit.com
They have 30 days to respond to your request. Keep in mind that there are provisions in GDPR that may allow Reddit to retain your data (such as anti-money laundering, anti-terrorism, etc), but you will at least get a yes/no reply as to whether your data can be deleted.
Evolved too funny. Come talk with Grug in cave.
https://kbin.social/m/Talesfromcavesupport