Hi dominik_F,
Flutter is not officially supported at this time. I recommend creating a new feature request on our
User Voice platform as I can see this being a useful feature. It means more when the request comes from you directly than from me. Note, we can still automate it with
image/pixel based actions, however, this would be quit ridged compared to normal automation methods (still better than nothing!).
Regarding the "android app bundles" question, I have not personally heard of this change, but if this becomes a requirement or there is a large shift to this, I am sure our developers will make the required changes to accommodate this. At this time, I have not seen any request to support app bundles. This would be another great item to add to our user voice page to start giving it some visibility as our product managers review this directly.
Cheers,
Ned