We have identified and resolved the problem. For posterity, we had enabled one of the glance modules for the add-on but there were other glance modules they also wanted enabled. This will soon be a non-issue for future developers as we will be enabling a descriptor flag where you as developers can enable or disable support for each of your modules in the native apps, rather than needing us to whitelist them for you. More to come on this soon.
Thanks for raising the problem @maciek and @jack
Edit: as promised, the ‘more to come on this soon’ - App module support on Jira Cloud Android, iOS, and Mac clients now generally available
You can now self-service enabling your apps for mobile.