You bring up some valid points. I traveled to China recently. Phones like iPhone 5 practically don't work there, because the specifications supported by these phones are phased out to such a degree that you're hard pressed to find coverage even in urban areas. I.e. 4G and 5G made the older specs obsolete, so you're obligated to buy a newer device.

Though, I guess it's possible that these bands were never supported in China. If anyone cares to chime in.