Add it to filtered websites?

Block the account making the posts, it's a bot account and that's all it does

You can try blocking instances made specifically to mirror reddit. I think there was one called lemmit, I don't know if it's still around

I feel like I'm developing some kind of reading disability lately; I read the title as

Can I filter Reddit feed posts from my feces?

Otherwise I second the other posts about blocking the bots you don't want, worked well for me so far.

Fellow Voyager user here: have you considered looking at the posts in question to see if they are consistently made using the same bot account? Blocking a bot account could be a good way to block what you’re looking for.

Or perhaps block posts with links pointing to reddit.com? I block links to several different domains through Voyager, and really my only complaint is that the domains are listed in order of when you blocked them, not alphabetical order.

You are probably referring to Lemmit and other RSS and/or scraping instances, you can block the entire instance