Early model Trax vehicles have the simple dash, the dash is similar to the dash that came in the lower Camaro models.
Low air is shown by illuminating the yellow TPMS along with the tire that is low, for example it might read LF 29 or RF 29.
It ONLY indicates the low tire, it is only visible when the tire is LOWER the recommended air pressure.
This is a very low tech dash only the newer dash has the full read out that you are used to.