Also getting this issue with installed certificates not appearing in the Trust Store after upgrading my iPhone from an iPhone 8 to an iPhone 11 using the Quick Start utility. This is quite critical as I use mTLS with my own PKI to authenticate to some internal websites and this is now broken.
Thanks @om-q for the investigation - if we still don’t have a workaround in a few weeks then it seems like erasing all settings will fix the issue although I obviously wouldn’t prefer this option!
Is there any ETA for a fix on this?