No Audio from iPAD through ATEM Mini

Presenting powerpoint and other files through my iPAD Air (2022)...but cannot present videos (embedded or otherwise - like YouTube...etc.) because the AUDIO does not seem to function when I do this.

I am connected through  an HDMI cable.... and yes - I can see the video on Zoom - but the audio does not come through.

Is this an IPAD setting?...or is there a ZOOM setting I should be looking at? (Or  setting on the ATEM mini.)

Appreciate any guidance you can give.

-Paul