If your WlanPi is listed as a Com Port Device, see the image, then you need to install another driver for it.
Step 1
Download the correct WlanPi RNDIS Driver from the link below and extract the file:
https://www.helge-keck.com/downloads/rndis_driver.zip
Step 2
Double click the COM Port device, switch to the Driver tab and click Update Driver
Step 3
click Browse my computer for driver software
Step 4
select the folder you just extracted from Step 1 and click Next
Step 5
Your WlanPi should now be recognized as a Network Adapter, thats it
If you still have any questions please feel free to contact me whenever you want