Is every theater is a dine in one? how do we know if book online?

Some are dine in and it will say "dine in" next to the movie listing online or in the app.

If you use the AMC app, it will specify if it's dine-in, 3D, or regular. All seats are recliners though and the food is great.

Only the left side theatres are dine in from when I was last there which I think are screens 1-11

Only some are dine in.