I found out that can set a third party app as the default browser app at the Keynote and iOS 14 Preview Page.
How to change the default browser on iOS 14?
What are the requirements to make my app the default browser?
If you have any documentation or related movies, please let me know.
How to change the default browser on iOS 14?
What are the requirements to make my app the default browser?
If you have any documentation or related movies, please let me know.
https://developer.apple.com/forums/thread/650027 has the answer