Mlem for iOS already has this

No, it wouldn’t. The Beehaw server is located in the United States. External communities aren’t retrieved via your machine, but via their server.

I’m a mod of a moderately sized subreddit (~15k) with lots of people who use Reddit only to interact with that community. We’ve been trying to disseminate information about our official Lemmy, Kbin and Raddle alternatives, but adoption has been slow to nonexistent. So I’m probably going to stick around in both, if for no other reason that to moderate said subreddit.

They explicitly told me in Matrix to not write that, so I just wrote two paragraphs summarizing the two posts they linked in the application guide.

Hm, that’s definitely not true. Just ask the admins to remove that user and let you try again.

I know of several different groups working on this, from the main developers of Lemmy to people hacking together browser plugins to make this possible already now. I think we will start seeing some of the first of these released in the coming week or two.