Depends upon which direction you turned leaving the AA ramp areas. If you turned right, good possibility you would have seen the UA ramp/terminals as the normal routing takes you right by them on your way to 32L-T10 intersection. If you turned left from AA ramps, you would have taxied past most of the UA ramp/terminal area on your way to 32L-T10 intersection.
FWIW, you would definitely have taxied past UA ramp/terminal area going to 32L, 04L and 09L. Good chance of doing so going to 14L/R and 09R as well. ya just never know at ORD.