If you access via mobile, you can see the video tiles of the teacher's video and the your owns.
Students cannot see the screens of other friends.
Basic Screen
1.
Only the screen of Teacher 1/ Myself 1 is visible.
2.
Chatting/Checking class materials is possible.
When the teacher shares the screen
If students accesses via mobile, they cannot share their screen even if they receive permission from the teacher.