The web application, which is often repacked into “native” applications, doesn’t support calling. Waydroid doesn’t support audio/video in/output for WhatsApp according to various Github threads.
Your best bet may be to set up Android-x86 in a virtual machine and using USB forwarding to get video working. I’m not sure what you’d need to get sound working, though.
It’s also possible that Google’s development emulator can run this stuff, I recall it having a webcam forwarding feature at least, but I don’t know about audio or if WhatsApp will work on there.