Your tablet actually has TWO cameras! One faces you as you look at the screen and the other faces what is behind the tablet as shown below.
Most telehealth calls will open with the camera facing you. But, if the wrong camera is on when you are in a call, you can change to the camera that faces you.
Tap the little arrow next to the picture of the camera at the bottom of your screen as shown below.
Then tap the camera that says “built in” as shown below.