I am meeting my grandson while he has a layover in Charlottte. If he comes outside the secured area, can I bring him a sandwich and eat with him in the lobby near the ticketing area?

Yep, you can hang out and eat. The only thing is he'll have to go back through security when you're done.

Yes. He will just have to go back through security

Yes you can do anything you want outside of security. They have lots of chairs near the windows and you can eat and drink whatever you like. Also there is a Starbucks if you need to buy something. Be sure to leave time to go back through security.