The Pershing did not see action till early in 45, February I think.
But the game does crazy stuff all the time, including Vehicles and other kit that did not see service in many of the battles we have maps for.
I think the argument could be made that having late war stuff in the game early waters down the idea of having late war or early war distinctions, but i think the game is moving away from to one kind of big mash up of kit anyway when they do away with the campaigns as we know them now.
So maybe we will see He 162’s and Pershing’s on Normandy maps some day.
This first shipment of Pershings arrived in Antwerp in January 1945.
Problem with the m18 is that the maps are not designed for it. It was a shoot and move type of tank with its speed. Normandy maps are just hills/debris/ crap to get stuck on
historical accuracy flushed down the toilet already, so we can go all out (but still i hope not to see the Japanese defending the Reichstag from soviets, and such shit)