[unsnap_biceps]

Pairing requires bluetooth, streaming requires WiFi,

https://support.apple.com/en-us/120421

Under iPhone Mirroring system requirements

Your iPhone and Mac are signed in to the same Apple Account using two-factor authentication.

Your iPhone and Mac have Bluetooth and Wi-Fi turned on.

Your iPhone is not sharing its cellular connection (Personal Hotspot is not in use).

Your Mac is not sharing its internet connection or using AirPlay or Sidecar.

[lxgr]

Wi-Fi needs to be turned on, but the connected network is irrelevant, similar to AirDrop.

[illiac786]

Interesting that it works no matter the WiFi. But it’s still not tethering.

Lots of people who are entitled to a corporate smartphone also have a single phone with two sims for work/personal, because of the same reasons: cheaper, more convenient, large data plans on corporate device. These devices are MDM enrolled and the company will at least check what apps are installed.