When I subscribe to a community using an account I created in a new instance all federated communities look empties to me.
Is this some kind of limitation of ActivityPub? Is there a fix being thought about? Is there an provisional/temporary solution?
Yes, I would call it a bug. If it’s the first time your instance ‘sees’ that community, only new posts will be federated.
It does not know about older posts, not even older pinned posts that may be important.
https://github.com/LemmyNet/lemmy/issues/2640 - fix appears to be in progress
using an account I created in a new instance
If it is a new instance install, the data starts empty and only fills each community after the first person on that instance subscribes. There is currently no tool or protocol for backfilling older content.
This is ok for communities about recent content (eg: news discussions) but kinda bad for other kind of communities.