Apple will let you roll back the iPhone’s security patches
by Mitchell Clark from The Verge - All Posts on (#63J7Q)
But doing so obviously leaves your phone unprotected. | Photo by Amelia Holowaty Krales / The Verge Apple will let you remove the security patches installed by iOS 16's Rapid Security Response system, which can install patches without the need to fully update your iPhone (or even without having to restart it, in some cases). According to a support document spotted by MacRumors, you can remove a Rapid Security Response update by going to Settings > General > About, then tapping on the iOS Version. From there, you'll be presented with a Remove Security Update" button.
The document doesn't give any examples of why you'd need to uninstall one of the patches, leaving your phone open to the vulnerability it protects against. It's easy to imagine a few special circumstances where the feature could be useful, perhaps if one messes up some...