You can use Screen Link with selected 3rd Party apps, like OBS Studio for Windows 10.
1) Install 4K Capture Utility 1.4 or later in Windows 10.
2) Install and setup Screen Link app for iOS. Setup instructions can be found here.
3) Open OBS Studio in Windows 10.
4) Click the + icon under "Sources" and select Video Capture Device.
5) Give the new source a name, in this case Screen Link.
6) Click on "OK".
7) From the drop down menu, select the Elgato Screen Link source.
8) Do not configure any other settings and click on "OK".
9) Now start the Screen Link broadcast from the iOS device.