There's a fairly comprehensive map of vendors on the concourses available on Google. It shows MOST of the restaurants as well as many of the other vendors.
There are about 5 of them.
There in practically every other Concourse.
Yes
Rather go to Chick-fil-A
Is the restaurants more expensive inside airport compared to outside?
No
Yes, they have every vendor you can think of
Also in the main terminal
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