Everyone uses the example of stadiums, but the occupancy rate of stadiums makes the economics of the network and backhaul iffy. I would guess only the biggest NFL stadiums get it as a showcase. Maybe parts of Manhattan, too.

Chinese cities, especially at train stations and the surrounding area get really impressive flows of people every day. But even in China I would expect that while they might have a lot more 5G SA when in the US, that the radios are actually mid band and not millimeter wave for most coverage. You still get higher capacity and low latency, but most people probably don't notice the low latency, except maybe Chinese autonomous taxis faking it till they make it.