Maybe it's something they only add in luxury homes.
(Note: I'm a New Yorker but not an expert in building code.)
I would believe it's different in CA, though. CA's public health regulations are famously stricter than elsewhere in the country.
https://www.prolinerangehoods.com/blog/is-a-range-hood-requi....
Thinking back so did my home in VA, DC and my last two homes in TX. I wonder what is different about our scenarios
On top of that I’m not sure if anyone has studied what percentage of people actually turn their fume hoods on, because I bet that is low too.
A true fume hood overhangs the front of the stove and can be heard when turned on, and requires makeup air.
https://www.youtube.com/watch?v=rSIqKGsF2ZA
(Note that a proper ventilation system is recommended for ANY stove/cooking besides maybe a microwave/pressure cooker, but especially needed for gas)