Aside from the scanning function, they likely have many geolocated images from people catching pokemon in AR mode.

Readers here really need to learn how to cut through hype better than they do. Pokemon go data is limited in far more ways. Many points of interest couldn't even be scanned like this because they were mural on the sides of buildings and don't even have more than one side. At least at first, there was no punishment for not actually scanning anything at all. You could walk in a circle with your phone pointed at the ground and it would still count that and give you points. People played in the dark or in crowds that didn't want to be filmed and this was the only way Niantic could make a feature like this that awarded prizes palatable to everyone. Beyond that, the points of interest don't even all exist. Plenty of the original database from Ingress is still present on the PoGo maps in Dallas and much of it hasn't existed in the real world for a decade, but players have no incentive to remove them because the more that exist in the game, the more you can get from playing since they're the points that spawn everything you might want to collect while playing. This became especially noticeable during the Black Lives Matter hubbub a decade back when old monuments to Civil War heroes erected during the Civil Rights era were torn down. All of those were POI in Ingress and PoGo and they still are, but they're gone from the real world.

I feel like users and readers instinctively know these limitations. We work with digital maps all the time that are out-of-date. Google and Apple don't and can't know any and all road closure and vehicle accidents in real time. Your car's radar road mapping service is as up-to-date as anything, but you still may be the first person to ever encounter a sinkhole or pothole that just appeared and it won't be on the map until you discover it. Satellite data is even more out of date because it can't be as frequently updated. There aren't anywhere near as many sensors in orbit or aerially as there are on the ground.

I haven't played PoGo in a while, but Niantic used to have human moderators and also tried to crowd-source some quality control on these world models because they knew 99% of the scans they received were bunk, either of nothing, the wrong thing, the right thing but in the dark or from an obstructed angle. I have no idea how good a job they ever did of cleaning that up, but it's a difficult task and it's never done because the world is always changing. There's only so much you can do here. Technology isn't magic.