This is a paid app with some free features.

The app converts your mobile into a powerful teaching an learning platform.
It has 2 apps in one.

With LIVECLASS, you can stream your screen interactions and lessons over ZOOM or TEAMS, thereby making ZOOM and teams a virtual classroom.
Lessons can also be saved an shared as a video.

Start the lesson, add your content to the lesson at the appropriate time and annotate ( write over the images and content )

With LIVESCREEN you have a fully live interactive whiteboard with audio.

Current price is 5 USD per month for all features.