Is it really not common? I don't thing I have seen a digital clock or modern wall clock which doesn't have it. I think my Microwave has it too. Onky my oven doesn't. Is it maybe more common in Europe?
I’m also in Europe (France) and during my entire life I never owned a single appliance with automatic time configuration (except for anything iot of course).
I have seen this automatic radio thing once in a very old alarm clock owned by my grandfather but that was probably in the end of the 90s.
I use a Phillips Smart Sleep alarm clock that doesn’t support this, despite being pretty expensive at around $100. I’m not even sure if the higher end model which costs twice as much and claims to be “connected” supports this feature.