Not good.
If you already have command time on type when you join, then there is usually no problem.
However, if you are hired as an expat F/O, your chances of getting moved into the left seat are not good. The local F/Os would object (quite rightly) and life could become very difficult for you.
I have even seen written death threats issued if you were seen to be jumping the queue. Although I don't recall an expat pilot being "disappeared" in my experience, I have been on contracts where it was quite possible to have someone "disappeared" for about USD10.
I remember going to one airline's HQ with one of our F/E's who had just received yet another death threat. The Director of Flight Operations met us with great courtesy and dismissed the worry.
He told us that he had at least three empty coffins delivered to his front door every month!!!!