Question: how to transfer files from pc to ipad via wifi?
Answer: Connect iPad to your Mac. You can connect using USB, or if you set up Wi-Fi syncing, you can use a Wi-Fi connection.
In the Finder sidebar on your Mac, select your iPad. Note: To use the Finder to transfer files, macOS Catalina is required. ... 
At the top of the Finder window, click Files, then do one of the following: