All of these subs should have been linking to a comparable Lemmy community instead of just saying they were protesting. The simple fact of the matter is that the lemmyverse is not mature enough of a platform to actually be a reddit replacement. It needs to get a lot of the kinks worked out and it needs a much better onboarding. Hopefully it can take these new users and steadily grow and while they grow they can fix these issues.
I am pretty sure that it is your browser that is the problem. Kbin does not have an app. it is simply going to put a link to the website on your home screen if you click that. Its considered a webapp and your browser is detecting that. It’ll basically be a link to the same site except without a navigation bar and it won’t save history iirc.