Linux cannot resize the participant screen or show more than 4 participants during sharing

Could you resolve the issue?

I am also having this issue. Any fix planned?

any updates ?

meeting participants are very small and I can't resize the window (make them bigger)

Same here. Super frustrating.

Interesting. I have had a related problem with Zoom on Windows. The GUI is pretty inflexible when resizing the participants window. When screen sharing this is especially noticeable as it limits the amount of screen you're able to share if you want to have the participants window and the screen you are sharing on the same monitor. 

Have you submitted feedback to Zoom?

Unfortunately I was unable to submit feedback as you have to your paid user to do it. 😐

Adding a data point, since this is still unresolved. Zoom Client 7.2.0 (AUR package) on Arch Linux with i3 (native X11). I saw identical behavior earlier on Pop!_OS (GNOME), so it isn't specific to one desktop or window manager.

On macOS, my students' video thumbnails line up horizontally along the top of the screen during a share. On Linux they only ever stack vertically in a small default-size panel (about 208x270), and I can't find any setting to change that.

I tried resizing the panel with my window manager to see if Zoom would re-flow the layout. The window itself has no size restrictions (it declares no min/max size hints), and the WM resized it to 900x150 without complaint. In "Show small active speaker video" view, Zoom stretched the single video to fill the new shape instead of re-laying it out. In "Show thumbnail video" view, the panel reverted to its default size and vertical stack. Zoom also creates a brand-new window each time I switch between these two views, so a resize doesn't persist even if it worked.

So this doesn't look fixable from the user or window-manager side. The client controls the layout and doesn't re-flow it. I teach over Zoom and need to see every student's thumbnail while sharing, so a horizontal thumbnail strip, or a panel that re-flows to fit its size like the Windows and macOS clients, would help a lot.