Prerequisites
This feature works on all the smartphones running Android 9 Pie or the latest and iOS 12 or latest.The Windows 10 machine should be Bluetooth enabled to receive calls on it.Make sure that your Windows 10 is updated to the latest build to get this feature working.
Steps to enable Call Receive feature on Windows 10
P.S.: You need to have headphones with a mic connected to your laptop so you can talk clearly on calls.
Wrapping up
The feature is in preview so you might see some glitches or crashes but in our testing, this feature worked well without any problem. If you want, you can easily get the call back on your phone using one button on the call screen.