It is a custom in many parts of the world with different names. Singapore has a lively street food culture.
I like to look at the YouTube videos of the street-food vendors in different countries - some of them turn it into performance art.
There are countries I’d like to visit, just for the street food ;-)
And I covet one of these Thai Popsicle Makers, even if it’s only for ONE party, with kids - perfect for a July 4 shindig:
https://importfood.com/videos/item/thai-popsicles
(Import Food is a great little family-run company.)