Easiest, leverage USB restricted mode: https://www.theverge.com/2018/7/10/17550316/apple-iphone-usb-restricted-mode-how-to-use-security https://www.theverge.com

Easiest, leverage USB restricted mode: https://www.theverge.com/2018/7/10/17550316/apple-iphone-usb-restricted-mode-how-to-use-security https://www.theverge.com/2018/7/10/17550316/apple-iphone-usb... Reasonable: use Apple's free device management app and lock out sync to any other / unknown hosts, along with a few other settings. Note that 1Password for iOS has a travel mode for this situation as well.