sudo apt-get install consent

Usually users can post from any instance to any federated community on any server.

Unless the federation between lemmy.ca and Lemmy.ml is wonky/broken, one of the servers is overloaded, or they’ve explicitly forbidden it, you should be able to post there.

See for yourself: https://old.reddit.com/user/spez/

Same, but then I saw them on his user profile with the old reddit design. Giving up would have honestly been a better use of my time.