e've unfortunately been having this issue too ... apparently a grey screen appears immediately after launch ... we've tried everything to troubleshoot .... tried across multiple devices including multiple iPads (including same M-chip versions as the testing version).
Also a flutter iOS app.
None of us can replicate this and the feedback from the reviewers have been minimal and repeated unfortunately making it near possible to troubleshoot.
In the past we've also managed to plead that they allow the update since there were other known bugs that were in our fix and they approved it ... we got no bug reports re a grey screen.
This seems to be very much specific to Apple review team ... I'm not sure what it could be but would be really helpful to have some help!
