Actually 1942 , December for the Factory Fit MG34 that the loader could operate with a shield, but there are photos of field modifications done prior to that with a protected MG.
Only the Coaxial came in 44’.
So its the Devs being lazy not modeling that in and making the tank more effective.
I’d recommend Band of Brothers. There’s a section in the series about Market Garden that shows British armor (Cromwells, I think) advancing with Easy Company. At the risk of giving away spoilers, it all goes horribly wrong…
BoB also showed a lot of German half tracks, tanks (other than Tigers) and some support type vehicles, like StuGs, Marders, etc. It’s about 23 years past now, but worth checking out.