Here (Japan) places that need hand-washing but don't have a toilet will just have a small sink.
E.g. a fast food place in a mall where they don't have their own toilets: https://saga-style.jp/images/2573/files/251552529081.JPG
Convenience store: https://blog-imgs-65.fc2.com/d/a/i/daiwariki/20140731_2.jpg https://uttan.net/wp-content/uploads/2020/04/IMG_0332.jpg https://chie-pctr.c.yimg.jp/dk/iwiz-chie/que-1087926330?w=20...
