Sharing screen on iPad. Student can’t see what I’m doing.

[Nida95]

Hi everyone, I am tutor using Zoom client on my iPad Air. When I shared the screen and open the lesson on cloud drive but when I used the pen, highlight or text while teaching. My students can’t see what I am doing. But I can see them wrote the note or highlight on the screen I shared. What should I do? I need help,please!