I've just realized that the COM.LTE Module (SIM7600G) only seems to be CAT1 and not CAT4 as advertised in your store. See SIMCOM description.
Only the SIM7600G -H version seems to be CAT4. See here.

I have to say, if my conclusion is correct and true, that I am quite a bit disappointed.

Care to comment?

Thanks
Felix

P.S. I understand that when used with ESP32 the speed difference probably doesn't really matter, but the SIM7600G can be used through USB with a computer as well and then the speed difference matters.