While looking for posts with the #degoogle hastag with my mastodon account, I realized that mixed in the hastag timeline there were posts to the !degoogle@lemmy.ml community, but not containing the hastag itself in the text.
I tried to look around, but In wasn’t able to find an explanation of how this is supposed to work: is it because of the name of the community that is the same of the hastag? Or is or because the hastag is “embedded” in the community itself?


No, not really. The devs made it an automatic one. Not ones you can manually assign to a community.
Oh, on. The setting thing was what I understood from the discussion in the link, but I didn’t go very deep