Using Chrome PWA to Share Screen in Zoom Rooms

Our teachers connect to Projector via Zoom Rooms from their Windows PC - this works great.  Occasionally we need to use a Chromebook to connect to the projector.  This worked fine with the legacy Chrome app that was phased out. 

The replacement PWA client does not provide the "Share Screen" option to connect to the Zoom Room.  Does anyone have a workaround for this?