Unable to subscribe to a community on lemmy.ml from lemmy.ca

I have been trying to subscribe to lemmy.ml/c/apple using my account on lemmy.ca, however I get a 404 error when I visit lemmy.ca/c/apple@lemmy.ml

Other communities work fine and I'm able to subscribe. Just curious what could be the issue. Do I need to wait for the community to be made "available" on lemmy.ca?