He presents these in a most complicated to least complicated format. The first option is hooking up multiple screens. If you don't want this option skip to option #2 at 3:31 in the video - Logging in to Google Meet with 2 different devices. If you want the simplest option skip to #3 at 5:21 and look at Overlay Your Presentation and Meet Windows.
This video covers digital whiteboard tools you can use with Google Meet including Chrome Canvas and Google Jamboard. Both allow you to create lessons you can save. Jamboard allows students to interact with the whiteboard and allows you to make multiple slides.
This video will show you how you can see students drawing on whiteboards without them having to do any screensharing with you.
This video will show you how to create slots on a Google Calendar for parents to chose from to sign up for a conference time. Parents will get a Google Meet link when they sign up that they will use at their appointment time.