Just released for developersiOS16Beta 2Then,Back up your device to iCloud over LTE and 5G networksI found that it was like this.
Functions that were previously possible only via Wi-Fi are now available on mobile connections
Until now, iCloud backup was only available via Wi-Fi and had to be given an option by the carrier to do it over a 5G network.
Apple summarizes the backup changes as follows:
New in iOS 16 and iPad OS 16 Beta 2.iOS16For customers usingYou can now back up your device not only with 5G or Wi-Fi connections, but also with LTE cellular connections。（95276719）
iOS16 adds support for iCloud backups in LTE and 5G, as well as several new features such as a lock screen featuring widgets, enhanced centralized mode, improved iMessage, and passkey.