No manufacturer making quality UL listed cable will make any rg6 not capable of 2.2Ghz. They don't have a separate formula or process for making 1000Nhz cable.
Swept to 2.2Ghz only refers to the sweep test. A batch of cable is tested. That's all. If it is not marked as swept to 2.2Ghz, it has just not been tested.
It does not mean that it will not work at or is capable of 2.2Ghz transmission.
Except for some old cheap off brand or imported cable, I have not seen any currently made standard rg6 cable not work for DishPro or DishPro+ installations.