How do you find that the little food truck accepts Bitcoin over lightning by Googling if the food truck doesn't even have a website? (In the US food trucks probably have websites, but definitely not in the rest of the world)

I'm still not following on your argument or how do you propose this to be done? The solution has many problems (records get outdated, some shops require custom app, it's somewhat tricky to enter data, etc), but I don't really see how this could be done better in a major way? The communities I know had to manually call the businesses to do the verification (or chat them over WhatsApp, which is the main business channel in South America).

The work is done by individuals, the btcmap team as far as I can tell only provides tooling support and the app.