I use Zoom desktop version (windows 10). I teach online lessons through a company who schedules Zoom Meetings for me as a host and a student (one-on-one). My student and I just need to click the email meeting links and they would automatically take us to the same meeting, with my admitting the student in.
Every time, when a student enters the meeting, the Screen Sharing Button in green color at the bottom right next to the Participants would show up.
However, when I create a new meeting on my own without the company, sending out the invitation to a student and admitting him/her in, the Screen Sharing is NOT enabled.
*I thought the green button Screen Share only showed up when my student entered, for it's always been that way for me. But, when I watched YouTube or other videos about screen share on Zoom, the green button shows up even with the host (one participant). So...... why my does not do the same?