This is the Panther F, it was originally present in the testing of the Berlin Campaign
I believe it was removed because it was only built as a protoype and not used in combat. However it could make its return now that we have Ho-Ri and T-34-100
It has the same gun as Panther A/G but a different turret with a less trolly armor and higher rate of fire for its main gun. The hull is unchanged from the G variant.
It is said that some Panther F were produced and used in Berlin, but they most likely used Panther G turrets since the turrets weren’t ready. Production was expected to being around April 1945 so i guess that is why it was removed, i guess they could add it as some event squad/vehicle.