Can you tell if someone is checking your location?

No. Android and iPhones iOS do not notify or give an indication when someone checks your location. There is a brief icon displayed in the notification bar when GPS is used by location services. Any number of apps or system processes trigger a location check.

Can people see my location on Google Meet?

An update to Hangouts for Android today sees Google remove the ability to share your location. The location sharing capability in Hangouts is very rudimentary and does not provide real-time tracking like Google Maps.

Can Google Meet see what youre doing?

Obviously, if youre sharing your screen, the teacher will be able to see your every move. But other than that, Google Meet ensures complete privacy, at least from their end. Still, there have been some reports of teachers pointing out that a students tab has been switched right after a student switches it.