In April, I launched an add-on on Firefox desktop and Android.
Both were accepted.
I changed 4 time the extension and the 10th of June I pushed an update of the Android version.
It was working well on mobile.
But we had to fix a minor bug.
Since yesterday all the new version that we try to push on Android are accepted but impossible to use them on mobile.
On the add-on page on Firefox, we have this message :
“This module is not available for your platform”
If you only see Firefox in the list, click the “Add Another Application” link, select Firefox for Android, and set the minimum version number to an appropriate version greater than or equal to 120.0.
Oh! It looks like you have the opposite problem from how I initially read your post: the “this add-on is not available on your platform” warning message appears on the desktop page, but does not appear on the Android page.
For reference, AMO uses different URLs depending whether a user navigates to an add-on on desktop or mobile. This is similar to how the URL can contain the local ID you want to view the page in.
Platform
URL template
Desktop
https://addons.mozilla.org/firefox/addon/<SLUG>
Mobile
https://addons.mozilla.org/android/addon/<SLUG>
Auto-detect
https://addons.mozilla.org/addon/<SLUG>
In the above URL templates, replace <SLUG> with the short name you set up in AMO for your add-on.