I don't think that would be very popular considering how easy it is to hotspot to your phone. Their watches only offer cellular because they're frequently used away from a phone.
I would love it though if they did, but it would probably require a data-only esim.
They do it for iPad but yeah probably niche
Yeah, I'm surprised this request still comes up a lot in techie circles. 15 years ago it made sense. When I packed up and moved to San Francisco with nothing but an AirBnB for a few days, I didn't even have a smartphone, so I bought an iPad with cell data to be able to look for apartments. But these days, it's gotta be a pretty rare scenario to not have a smartphone with a data plan and at least a way to upgrade to enable tethering.