We're experiencing the same issue with the release candidate. Seems that Xcode 15 is not able to install our dev certificate to the device.
So there is no way of actually trusting it.
Edit:
Not quite show how I fixed it. But by some combination of deleting derived data, restarting my phone, and reinstalling Xcode 15 release candidate it now work.
Topic:
Developer Tools & Services
SubTopic:
Xcode
Tags: