When you open a link from somewhere else, a “Show on home instance” link will be added to the top bar. Only within the browser will it automatically replace links.
I so far only support Lemmy. No one has made any other requests. So if not /c/ is used, it doesn’t know how to handle communities.
I will update the instance list. I have a script that parses lemmyverse.net data and updates the list within the script, but I need to run it manually.
Generally all issues/requests can be added in https://gitlab.com/azzurite/lemmy-universal-link-switcher/-/issues. There is no Lemmy community for it. How did you find this? I had like 3 people suddenly write on this year old thread.