Well this is going to get a little politically incorrect ... and somewhat speculative.
On a side note, I wonder why such extreme misogynistic aspects of some of the more fundamentalistic Islamic society aren't as often used as background settings for such stories as the Roman ones. When an Arab or Islamic society is used as such a setting in D/s fantasies, it's more often than not used to contrast the innocence of a civilized white girl against more 'barbaric' and probably more sensual and 'less civilized' non-white people, which may or may not be due to the author's own personal prejudices.
It's absolutely true that the hugely overwhelming majority of stories featuring Islamic society has that view of 'Orientalism' (in the 19th century painting sense, not the shove-Edward-Said-down-everyone's-throat sense).
Now
some aspects of that may apply to reality, as the West or 'white people' do not have a monopoly on developing stereotypes ...
... there certainly are stereotypes about 'western/white' women that are perpetuated within Islamic culture, just as we have our own prejudices and tropes.
('Whiteness' is not really a helpful concept here though, as the line between Dar-al-Islam and Dar-al-Harb can't be drawn by skin color, a Turk isn't necessarily more 'colored' than a Greek, not to mention European nations that are historically of religiously mixed population, like Bosnia, Albania, Serbia, Bulgaria etc etc etc ... and of course the same is true of religious conflict within other populations ... racist ideologies of supremacy, and religious ideologies of supremacy, both function independent of each other though of course they can be stacked on top of each other when the outgroup someone wants to attack happens to be of both different belief and different heritage. The idea that putting on a hijab makes someone a 'person of color' is a recent innovation of Western progressivism)
But when you look at the representations of the 'Other' in the shape of 'barbarians' even the Romans romanticized them to some degree ... you'll find examples of them being characterized, while inferior in cultivation, strategy, insight etc. ... as nevertheless more virile, and a counter-example to the decadence that the Romans long criticized among their own.
Romanticizing the 'Muslim barbarian' took off in the Occident pretty much when Islam became a threat that, while still credible, was contained and not imminent.
Fantasizing about 'white slavery', abduction and Ghazi raids wasn't a thing while they were really happening all over, but ... after the Ottoman defeat in 1683 turned into a multi-generational phase of Islamic decline, it became all the rage as the 18th century progressed.
(e.g.
Entführung aus dem Serail by Mozart)
The point here is that a
potential but not imminent & daily present threat, is the one that will be fantasized about.
Once the threat is real and imminent, the fantasies stop and are replaced by "fight or flight".
People of a fishermens' village who nervously scanned the horizons for Barbary raiders will not have romantically fantasized about them such as people do, for whom that is just an '
unbelieeeeeevable story, can you imagine!?!?!'
Yazidi women I guess will not fantasize very much about getting abducted by Muslim slave raiders ...
... nor would I expect that West African women who had to watch their siblings, parents, friends taken into slavery, and bought and transported away by Europeans, will have fantasized about that ...
... it is to a certain degree a luxury phenomenon.
And one cliché about 'whiteness' that certainly has a kernel of truth,
... is that women buying "50 Shades of Grey" in droves, is a very 'white' thing.
And I will openly admit, that some events that have happened in Germany since 2015, have definitely stifled, silenced and put an end to my ability to fantasize about certain scenarios, because they became lived experience. That this actually makes me angry tells you how perverted I am.
I believe such strict social codes of conduct enforced on women in those extreme religious nations could serve as a perfect fantasy background for such stories.
...
Personally, I would very much love to read such stories someday on CF.
Who's going to write them?
Women in Iran, for instance, are plenty oppressed ... but also many of them are well educated. (They're supposed to contribute to the economy)
I just don't think they fantasize about degradation .. because it is day to day reality.
The song of fantasy is of course always '
I want what I can't have'.
Most Iranian men, as far as I have experienced, honestly despise the aspect of their culture that's degrading to women.
They won't be writing those stories either.
Those men of such cultures, however, who
do exalt in the degradation of women, still won't write those stories ... because they are living it; why fantasize about degrading women, when you can join your local branch of the Basij and go and just do it, with government support.
Sadly it is those who currently dominate that culture despite being a minority.
All in all, oppressed women will not dream of oppression because it's their waking nightmare, and oppressing men will not dream of oppression because they already live and do it, it's the practice of their 'day game'.
Most people will write from the perspective of their own culture .... but those who are perceptive enough to write convincingly from the perspective of a different culture, will probably also be perceptive enough to realize, that the subjects of fantasy are also culturally developed... and that our subjects of fantasy, in an environment of largely realized sexual autonomy, don't apply to a different culture, that negates sexual autonomy.
(also in the climate today, at least in the West anyone attempting to write from a different perspective gets cancelled for cultural appropriation anyway)
So these stories will remain very rare, for reason of human experience.