Ability to Talk in Multiple Calls Verbally

A feature where you can talk in Multiple calls without having to leave one call to join the other would be pretty useful. There can be an ability to use a button to switch between calls so on one call you're muted, while on the other call, you're unmuted and your voice will go through there instead of the other call. Screenshare could be used to stream on both calls without having to switch. Only problem with having this is that it might not be able to support Mobile because of the Audio/Call mode it uses.