These clocks are irritating because they show up in the results when searching for “radio atomic clock” and similar, and it can be very hard to figure out if they actually use the WWVB radio signal. I’ve concluded that none of them do, because WWVB is only reliable in (most parts) of the US, and companies only want to make things that appeal to a global audience now. La Crosse seems to be the only one that makes them, and unfortunately most of their designs lack any style (i.e. they’re ugly).
There are actually other time signals around the world.
I had a Casio wave ceptor (one with analog hands which it doesn't look like they sell anymore; I should have kept it). Anyway, looking at a model that's currently available (WV-200R, but there are 2 other models available), its manual says it gets signals from "Germany (Mainflingen), England (Anthorn), United States (Fort Collins), [and] Japan."
I was curious so I looked those up:
Mainflingen DCF77 77.5 kHz
Anthorn 60 kHz
Fort Collins WWVB 60 kHz
Japan looks like they have Mount Otakayoda 40 kHz, and Mount Hagane 60 kHz.
There are also some other countries that have time broadcasts (e.g. France. Anywhere else?) but not that that watch uses.
It's like they hired a design firm in the early 00's and decided that design language is the peak of human horology... I wish they'd make a couple new designs.