I subscribed to communities, but my Lemmy instance receives only a few posts, comments and votes. I can see linked instances, but whether or not they sync data feels hit or miss. I’m not quite sure if this is expected. Does Lemmy have a utility similar to the Matrix federation tester?
The instance might be very busy and it won’t sync older content from before you subscribed.
Your comment made it into lemmy.ml fine, but it seems outbound isn’t getting to you very well. Your comment was the 9th comment on this posting, the one you are reading is number 10. Your home sever posting: https://lemmy.wtf/post/1021
Edit: the lemmy.ml posting with 10 total comments currently is here: https://lemmy.ml/post/1239920