Can't share background audio from pc while sharing ipad screen

This process is doable but it is not cheap and is not simple (initial setup). It requires a video capture device and multiple screens on the PC for best performance.

1. Connect the ipad to a video capture device.

2. In OBS Studio create a scene that includes the video capture device and captures audio from the PC.

3. Project the  scene to a separate window or to a full screen.

4, Capture the projected window in Zoom, which now includes video from the iPad and audio from the PC.