The issue in the Arab world is the lack of STEM graduates, on top of that most Arabs that pursue a field in STEM (including engineering) are women whom tend to do it for the sake of the paper, raising their value as a prospect in the eyes of other families, she will barely put it to use in the industry or academia as she will get married and become a housewife. The men are obsessed with becoming a doctor or some other profession society ties a high status to. That's already half of the population which can be scrapped, they're certainly not going to work in the west. Now as for the Arabs who ended up as refugees in the west, most of them are not doing so well. The 80's and 90's migration wave from Iraq are doing well, large part of the post 2003 and 2014 ones along with the Syrian migration wave didn't pursue higher education, as for those who did very few went into STEM apart from the medicine part.
Iranians are outnumbering Arabs in STEM, which is not only what I see from news reports but through my eyes having been at some technical universities. Not surprising their industries are developing whilst Arab states rely on western companies ToT and setting up local production.