they don’t have one. i think they do behind the scenes screening here like most american airports. i forgot a lot since my past intl flights there have had pre clearance and i haven’t been through their customs in 3 years.
No you should not pickup foreigner when coming back, there are 3 signs 1-Global Entry, 2- US & Canadian Citizens/Permanent Residents and 3- Foreign Nationals. You should go for Citizens and Permanent Residents