In Rome do what the Romans do.I had a waitress run after me and stopping me before I got in a taxi in Japan because I left a tip. She told me I forgot some money on the table.
I learned later than tipping can be considered rude in Japan
You are eating in places most likely frequent by tourists.I’m visiting Thailand for a month. Restaurants in Phuket include 7-10% service charge
Have I ever seen the term "service charge" written on the menu in all the places that I have been eating in the Kingdom since 1988? NO.