Thanks to several sources including The "Transformers Perú" Facebook Page and the Twitter feed of Citranite fans now have several photos of the vehicles being used as the alt-modes of Transformers characters from the film. Based on the official information released in June, the vehicles appear to represent: Optimus Prime, Bumblebee, Scourge, Mirage and Nightbird with one "mystery" vehicle being a pickup truck with the name "Bernie's" on the side (perhaps a reference to the character Bernie Mac who played Bobby Bolivia in the 2007 film).
Here is the official Paramount description of the film: "Returning to the action and spectacle that first captured moviegoers around the world 14 years ago with the original Transformers, Transformers: Rise of the Beasts will take audiences on a ‘90s globetrotting adventure and introduce the Maximals, Predacons, and Terrorcons to the existing battle on earth between Autobots and Decepticons. Directed by Steven Caple Jr. and starring Anthony Ramos and Dominique Fishback, the film arrives in theatres June 24, 2022."