Hey Lowkeyloki, if your browser supports it, you should be able to find the Share Screen button in the bottom left-hand corner of your video feed (the monitor icon).
I think that screen share ability should be mentioned in features in prominent place, I was skimming website in order to find out what is it and seemingly non-existent screen share was the reason why I discarded it immediately without even trying anything. Now I'll give it a second look.