Make a FaceTime audio call using Messages on Mac
In Messages, you can start a FaceTime audio call to one or more people who have a Mac, iOS device, or iPadOS device that meets these requirements.
Note: You need to sign in to FaceTime using your Apple ID and make sure FaceTime is turned on.
In the Messages app on your Mac, do one of the following to choose who you want to start the audio call with:
Click the Video button in the top-right corner of the window.
Choose FaceTime Audio to immediately start the call.