You are incorrect you can verify network access on iOS.
https://support.apple.com/en-us/HT212958
There’s an important distinction. On the first instance the app can’t access the outside world. On the second you will just know that it did.
[Edit]
See the author of keepassium commenting on the same issue about a month ago:
https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...