I want to change the background color of PHPicker's navigationbar in iOS15.
↓This answer did not work in PHPicker
https://developer.apple.com/forums/thread/682420
How to customize?
PHPicker is out of process and currently doesn't support any UI customization, other than inheriting your application's tint color.
We recommend just using the default system picker UI. Most users already used PHPicker in other apps, and familiarity could help them trusting your app.
However, please submit an enhancement request via the Feedback app, if you think your app needs specific customization options.