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@jalefkowit@octodon.social there is, but it's still pretty bad
gnu social has groups you can invoke via bangtags (as i like to call them)
so if you're interested in biking, you "join" the biking group, and then you just use it's bangtag: !biking
if you "join" the group, it'll appear in your timeline by default
@jalefkowit@octodon.social now, joining the group seems silly and unnecessary if you want to just post to it, but there's a simple reason for it!
federation is dumb
basically groups are treated like rss feeds (like users), so you have to "join" (read: follow) them to be able to be subbed to all their posts