Go to your phone homescreen and look at the app dock (the bottom row that contains some apps and stays the same when you switch pages).
Which are yours? Any FOSS apps?
In my case, they are FDroid, Signal, Threema, Firefox and the defaul Samsung camera app. So, 80% FOSS…
Thx for the hint, is fixed now
@LeFrog
Err…
The K9/thunderbird android still has the same link.
This may be due to slow federation of edits. You are using a Mastodon account, right? The federation maybe needs some additional time then