A kbin user has the most upvoted comment chain on that post.

https://kbin.social/m/meta%40lemm.ee/t/458933/How-do-I-block-all-of-Hexbear-from-All/top

sh.itjust.works and a 1-user Lemmy instance called lemmy.magnor.ovh also see and reply to Hexbear comments, though Hexbear doesn't see their replies:

https://lemmy.magnor.ovh/comment/2371501