There might be some motherboards with built-in WiFi chips that support PXE with configurable access point and security settings. Maybe try a Duck Duck Go search for wifi PXE.
There's no way for the BIOS to know your WPA key automatically, of course, and in general, you'll need wired Ethernet for PXE.
There's no way for the BIOS to know your WPA key automatically, of course, and in general, you'll need wired Ethernet for PXE.