I would like to offer a recommendation that for the Android Zoom App that an icon to access the menu always remain on top. Sometimes during a meeting I need to mute and access the menu quickly, and from Android it is not easy because the screen is filled with people.
A second issue is if one of the meeting participants is sharing the screen, there is no way to access the menu to mute or unmute. And you cannot see which direction the camera is facing. Somehow, my camera was reversed during this process of trying to get to the menu.