cwa-app-ios [a11y] Layout of 'warn on behalf' page is broken for extreme font sizes

Avoid duplicates

[x] Bug is not mentioned in the FAQ
[x] Bug is specific for iOS only, for general issues / questions that apply to iOS and Android please raise them in the documentation repository
[x] Bug is not already reported in another issue

Technical details

Screenshots were created with:

Device name: iPhone 12 / simulator (but all screen sizes are affected)
iOS version: iOS 15 / simulator (but all iOS versions are affected)
App version: current developer branch (branch = release/2.13.x as of Oct 17, commit = 584727) (but latest release 2.11. is affected as well)

Describe the bug

With extreme a11y settings the layout of the page "Warn on behalf of others" is broken. The descriptive text at the top can grow so much that it pushes the table of QR codes below the visible screen. Even the 'scan' button can be hidden. Of course you can scroll both in again, but you have to know. The only visible button on this page is disabled, which is especially confusing.

Steps to reproduce the issue

close cwa, open the Settings / Accessibility / Display & Text Size / Larger Text
enable Larger Accessibility Sizes
select the largest font size (note: on smaller screens the same happens earlier)
open cwa, select 'Event Planning' / three-dot-button / Warn for Others, and press the Continue button
the explanation text fills the whole visible screen. The list of QR codes and the scanning button are not visible without scrolling. The button 'Continue' is visible but disabled.