Just like T123694, but for the mobile app on iOS.
You'll want to create separate tickets for Android and iOS:
I'm not sure how closely Mobile-Apps is monitored
CC @Dbrant, @JMinor)
For the Android app, see T123876. Krenair told me to split into MobileFrontend and Mobile App, and now another user (dr0ptp4kt) told me to split into the iOS and Android apps.