Thank you Alex T⚜️ 

To clarify, Jitsi is not fully integrated into UNA App and it should be disabled completely for app submission to Apple? 

Jitsi isn't fully integrated, since there are a lot of features in it, but it doesn't mean it can't be used. 

I think all you need is to disable VoIP functionality when you are submitting app to Apple Store, by unchecking this checkbox: