With Adro bodykits and widebodies being introduced earlier, got me thinking.
new BMW M2 (would be new to Forza) has an Adro kit
Kia EV6 (would be new to Forza) has some Adro pieces available
Hyundai Elantra N (would be new to Forza) has a widebody, flares and two different stand alone wings
Corvette C8, current Ford Mustang also have a plethora of kits and pieces available. Just a thought.