In iOS 16, iPadOS 16, and macOS Ventura, the FaceTime app finally supports Handoff, which means FaceTime calls can be swapped from one device to another.
If you get a FaceTime call on your iPhone while you’re out of the house, you can answer it on the go and then swap over to the larger screen of a Mac when you return home. Or you can answer a call on your Mac and transfer over to an iPhone or iPad for a more portable FaceTime experience.
When a FaceTime call is handed off, connected Bluetooth headphones will transition to the new device too, so your call is not interrupted by the transfer.
Read more at MacRumors.com