Just killing time in between Euro2020 matches (it's a struggle staying awake between 1-2am) so might as well post some totally unproven sweeping generalisations ...
The freshly arrived ones especially from China and Japan often have the untamed bush.
Once they have been here for a while most give in to feedback and pressure from customers, management and colleagues and trim or shave.
Japanese girls are generally pretty obedient and submissive and will do what they are told, so I have fucked many Js who shaved just hours before starting their first shift or who do their first shift with the bush but are fully shaved by the second shift.
The Chinese girls are the most likely to hang on to their bush for as long as they can.
Thais are usually professionals who previously worked in Bangkok or Pattaya and so are used to servicing Westerners and know their preference for the shave or trim and so usually arrive pre-shaved.
Koreans as with their position on most things are somewhere between the Js and Cs just like Korea is on the map - sometimes they are more like Cs, sometimes more like Js, and sometimes they are uniquely Korean.