China is the first country I would expect to have ubiquitous fast charging. They are years ahead of the west in the EV rollout. Also high speed rail, robotics, high tech manufacturing in general is kind of their jam now.
Everywhere in China? China is a large place. My money would be on a small rich country that’s (almost) entirely a city. Monaco, Singapore, maybe Luxembourg.
Googling gives me https://transition-energetique.gouv.mc/en/themes/mobility/mo... which doesn’t mention fast C charging but says “Every Monegasque resident is now less than 200 metres from a free public charging point” ⇒ it wouldn’t surprise me if Monaco already meets your definition of “ubiquitous fast charging”
#1 reason why I shy away from all professional sports with serious money involved, it just turns into typical ugly business with skewed incentives, while actual sport ends up being just a necessary afterthought.
Better apartments there cost often 10-20 million euros, there are special controls in laws (ie employment) ensuring better treatment of those few Monaco citizens that are there. Most tax avoiding folks like those sportsmen rent just po box to get some sort of special residence. Most people you can actually meet there live in France and commute daily.
That place is a special bubble even within bubbles, nothing that applies there should be expected to apply elsewhere, apart from similar places (of which I am not that aware of maybe apart from San Marino, ie Singapore is more like a real tiny country with actual serious business in trading and transportation).
Given the area of the country is 2km, even given its narrow geography that would take all of 50 charging stations to achieve...