Apple provides information on security fixes of iOS 16.3.1. Having these issues in mind Apple now no longer supports downgrading to iOS 16.3 and previous releases.
Apple Support: About the security content of iOS 16.3.1 and iPadOS 16.3.1
References:
- Apple Stops Signing iOS 16.3 Following iOS 16.3.1 Launch, Downgrading No Longer Possible
- Apple reveals multiple new security exploits that were patched with iOS 16.3 updates
Recommendations
Developer:
Prevent devices from upgrading if iOS 16.3 support is necessary.QA engineer:
Prevent devices from upgrading if iOS 16.3 support is necessary.PM/DM:
Business as usual.