Permanently pin video on mobile even when screen was shared

Hi,

I would like to use my mobile phone like a small screen where I can see my participant's camera image in close-up throughout. I have tried pinging and using the zoom function on my mobile; this works quite well until we take turns sharing our screen - then zoom jumps to the shared screen content.

How can I have the image permanently visible on my phone (Android) without switching to the split screen content?