If you’re on a Mac, FaceTime is set as the default calling app.
📞 Here is how to change the default calling app on your Mac
1.Open the FaceTime app.
2. Click on 'Cmnd+ , (comma)'
3. On the Settings tab, next to Default for calls, open the drop-down menu and select the app you want to use as your default calling app.
5. Close the Preferences window to save the change.
From now on, when you click on a phone number or contact in your web browser, email app, or any other application, the call will automatically be routed through the app you selected as your default calling app.
Hope this helps!