The new MBAs did not use a model number (unless something is really weird) - they're just configurations of the newish Retina MacBook Air.
The new 13" MBP probably did use a model number. I initially thought it was just bringing the higher-end 13" Touch Bar chassis to the lower-end models - replacing the non-Touch Bar versions with Touch Bar equivalents (which would share the Touch Bar model number). It's not that simple, though... The new models still only have two Thunderbolt 3 ports (like the non Touch Bar models they replaced) - interpret it as adding T2, TrueTone and Touch Bar to that model, or as taking ports away from the Touch Bar model. If they call it an addition, it's almost certainly a new model number... If it's a subtraction of the two ports, it's probably a new model number. The FCC filing suggests is is a new model number.
Awaiting confirmation on both of these from EveryMac.com or similar sources.
With one new model number used up by the 13", we get...
Four for something skinny and cellular
One for the 16"
One for something else - big and incredibly skinny?
If the MBA somehow used a model as well, take away the "something else"...