Share Screen

I have an android tablet Samung A9 plus. I am trying to use web browser function to share screen in zoom meetings. When ever I start a meeting or join a meeting there is no share screen button at the bottom at all. I have not got the zoom app because you cannot create break out rooms from an app. I have tried the Web app to share screen and the share screen button isn't there either. 

Is there a web browser that share screen will work in? 

Or is the problem my device? 

If it has to be share screen or breaking out rooms then I will have to take breakout rooms but ideally I would like both if it is possible?