Due to the anatomy of most Transformers in Malgus world, they seem not to have real noses but simply have helmets or faceplates which curve to represent them.
Characters with noses
The Technorganic Transformers such as Waspinator and Blackarachnia have noses. However, it makes Blackarachnia incredibly hard to look at. Also, if they have shades for eyes like Prowl or Jazz, it isn't possible for their helmets to curve in like the others so they actually have noses.