I cant say what is going on now because it had been a while. But the only expats i flew with came in with a ME commercial seaplane rating and at least 1000 hr in Otters. FO were almost all local. Sometimes two expats would fly together but unusual. If you want to fly there you need to go pay your dues getting hours some where else.
really helps if your a tri. Spent alot of time in right seat with local fo's training for upgrade.