The joke of the comic (Explained moreso on the first page and in the previous comic) was that despite being the central character and mascot of the Transformer (Multi)verse and brand, Optimus Prime has never been the technical protagonist of any of the films developed, as a result of being killed off (and replaced), not featured or pushed into a supporting role in favour of humans being the main characters instead.

In Lio Convoy's case, he got a starring role in the Japanese film; Beast Wars II: Lio Conboy in Imminent Danger (https://tfwiki.net/wiki/Lio_Convoy_in_Imminent_Danger!) alongside Optimus Primal.
With his descendants from the future having a starring role in the film, Optimsu Prime had no mention nor appearance in it whatsoever.