I had no idea this tag existed so I looked it up: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/no...
Turns out it's a non-standard tag. FireFox supports it though and the Red Star OS uses a browser that is a fork of Firefox[0].
My understanding is that the Red Star OS is the only OS used in North Korea. So I guess that means in North Korea, `nobr` _is_ in the standard.