Foreign actors are also used as extras in some Taiwanese films.
After spending two years on the small island myself, I completely understand why.
If you don’t fit that description, don’t be discouraged, it’s still possible for you to find work as a model though it may be more difficult as there are many established professional Taiwanese models that typically get the high end modelling jobs for Asians.
Modelling experience is great but not really required or expected for most small modelling jobs.
In the last century missionaries arrived during a relatively puritanical period, and happened to mesh with then-current attitudes.
Authoritarian rule has given way to personal freedom, and the field of sex is no exception.