Unfortunately, OSM is very, very, very active in some areas, others not at all.
Even in some regions, not all people who map the region live there.
If I try to describe all the new facilities in Korea here, this community will probably be full of my articles. :rofl:
As you can see from the numerous pictures appearing in the search results, it has become a fairly common facility, at least in Korea.

Although low puddle-like facilities are mainly located in places such as beaches in Korea, they do not necessarily exist only in such places.
In addition, I think it should be categorized by considering other types of foot washing facilities.
Faucet shape, low shower shape, shallow puddle shape, etc.