No way to switch rooms on mobile

There's no left-menu navigation on mobile. How are we supposed to switch rooms???

On Android, after switching to Desktop mode, the touch interaction on the sidebar prevents navigating to other rooms.

The mobile user experience just tanked. It is as if a design decision was made not to let mobile users have a way to navigate.

Seems surprising that something like this would be released on such a widely-used application. Didn't someone consider the implications?