I just started my own Lemmy instance, and it looks to be mostly working.
The problem that I have is that the communities I went through the process of subscribing to only display up to 50 threads and no comments.
This looks like something I’ve seen on other servers, so I’m wondering what could be causing it and how to fix it.
ChatGPT says something about webfinger and nodeinfo, but I honestly have no idea what any of that is and there’s no mention of it in https://join-lemmy.org/docs/administration/federation_getting_started.html
That is how federation works. You will not get all content automatically, only the ones you wish for.
When you subscribe to a new community (as in your instance hasn’t “seen” it yet), it will fetch the last 20 posts. (excluding votes and comments)
If you wish to see older comments and posts, you must fetch them manually. You can see how that can be done here: https://join-lemmy.org/docs/administration/federation_getting_started.html