Interesting catch.
I found this SW list at their web site
https://suprememastertv.com/en1/worldwide/on shortwave radio:
Sub-Saharan Africa available in 46 countries on WRMI 15770 kHz
Europe, North Africa & Middle East available in 72 countries on WRMI 15770 kHz
South & Central Americas in 19 countries on WRMI 5800 kHz.
Central and Eastern United States, plus Canada, Bermuda, Greenland and Iceland on WRMI 9395 kHz
Western United States, Western Canada and Mexico on WRMI 5950 kHz
Central, South, Southeast and Western Asia in 41 countries on WRMI 7570 kHz