Posts to remote communities seems not federating to Mastodon

[kromonos]

Issue Summary

When creating a new post to a remote community, the post can't be found on other ActivityPub services like Mastodon.
Found this behavior with the following post I made: https://feddit.de/post/83962

When taking a look at the user's profile with mastodon, the post is not visible

Posts made by local users can be found without problems:

Steps to Reproduce

1. Create a post to a remote community
2. Search for the URL with a Mastodon account

[Nutomic]

You need to search the post id, which in this case is https://fapsi.be/post/36912. Problem is that this isnt shown anywhere in lemmy-ui. I opened LemmyNet/lemmy-ui#569 for that.