Hmm… let me test something. Does this show up green? If yes, I can select “Speak as moderator” even in communities that are not mine.

Weird. You also show up green in Voyager on iOS but only for that one comment. Even on your reply, you are unmarked and in the web interface, I don’t see any marking at all there is a small red shield icon without alt text.

They are probably a mod. Most clients show mods in green and admins in red.