Uploading tracks does not work on iphone

[bonham]

Observed behavior:

1. Open https://brouter.de/brouter-web on Apple device , either with Safari, Chrome or Firefox
2. Menu -> Laden -> Track laden
3. Browse in any folder on your iphone which contains gpx file
4. All files, including gpx and fit files are greyed out and can not be selected for upload

Expected behavior:

Gpx files on iphone should be selectable

Versions
BRouter-Web 0.18.1
iOS 18.5
Tested on Iphone 13 mini, iphone 16