My hot take is that I don’t like cross posting or reposting. I subscribe to communities for the unique content and perspectives that each one provides and to see a user posting the same thing to five different communities for whatever reason (getting upvotes seems to be the only reason) seems silly to me. Let go of the ego a bit and this need for internet points.
Depends on how you're doing it. It's common to be subscribed to multiple versions of any particular community and those cross posts will show up alongside each other in the feed.