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I think that when I am having link like https://lemmings.world/post/10530999 or knowing a title of the post, i can not discover in which community it has been posted… When I check same number of post on different instance: https://lemmy.ml/post/10530999 it does NOT work. Yet the search works: https://lemmy.ml/search?q=10530999 is there no other/easier way than opening one big instance after another (for example from the list https://lemmyverse.net/?order=posts&open=true ) and use search like that?
Thx, I have found that the small to medium Lemmy instances are NOT aware about the post, yet most of big instances are. So it fits what has been said: “New posts and comments should always propagate if at least one user is subscribed to the community.” - big instances and old instances has higher likelyhood of someone being subscibed to it prior to me posting the post, so the instance could download that post. Related topic: What are the conditions for the Lemmy post to be distributed to other Lemmy instances?