The zoom menu bar is positioned at the top of the screen and during a mating it block the top row of participants video so that you are not able to see their reaction as it blocks the top part of the video.
Is someone else using an iPad Pro 12.9 having the same problem? Can't Zoom make the screen customizable or have the video fit below the menubar and not under.
If you change to Gallery View, you can see more participants. If that's not quite what you're looking for, we'd love to hear your feedback on how to make it better.
At this time, all feature requests are managed within our https://zoom.us/feed submission form. We encourage you to submit this idea there, where the information will reach the relevant product team for review.
Hope that helps and please make sure to mark the solution as accepted if this information is what you needed.