As quoted from the linked post.
It looks like you’re part of one of our experiments. The logged-in mobile web experience is currently unavailable for a portion of users. To access the site you can log on via desktop, the mobile apps, or wait for the experiment to conclude.
This is separate from the API issue. This will actually BLOCK you from even viewing reddit on your phone without using the official app.
Archive.org link in case the post is removed.
Yepp! Found a self repair one on Lemmy.ml, although it’s been inactive for a year:
https://lemmy.ml/c/selfrepair !selfrepair@lemmy.ml https://lemmy.world/c/selfrepair@lemmy.ml
Searched on feddit browse for a Rossmann one and there isn’t any yet 😟. I don’t think my instance allows new groups so I’m hoping someone makes one soon