This was a change made with iOS 16.1, and it is a workaround for a vulnerability that would allow someone who had hacked your computer to make a backup of your iPhone that they could download and essentially have access to your private information. Here is a summary of the vulnerability:
Available for: iPhone 8 and later, iPad Pro (all models), iPad Air 3rd generation and later, iPad 5th generation and later, iPad mini 5th generation and later
Impact: An app may be able to access iOS backups
Description: A permissions issue was addressed with additional restrictions.
CVE-2022-32929: Csaba Fitzl (@theevilbit) of Offensive Security
If you want details you can find them in these two links: