Microsoft had finally fixed multiple PC support with Your Phone and the Surface Duo. Prior to the update of the Your Phone (beta) app for Android you could only have the Surface Duo 2 linked to one PC at a time. Unlike the original Surface Duo and other Android phones that can be connected to multiple PCs.
Once the app has been updated you can go to settings the phone and select Add computer from the Connected Devices section. So, you can have your Surface Duo 2 connected to multiple PCs.
We still don’t know when the Surface Duo and Surface Duo 2 will get the Apps feature that Samsung phones have in Your Phone or when the original Surface Duo will get the Android 11 update.