Man this is like those trashy "Sheikh/desert" romance novels. The thing is though, those novels usually glosses over the specific religion and country the ML comes from (even though there's a lot of Arabic/Turkic/Middle Eastern cultural references) because it's hard for the readers to relate to the ML and like the romance if they come from a specific RL country/religious background. There's also the fact that if they get too specific, the book can easily be seen to propagate misguided views on certain culture, people, religion, countries, which could spark controversy or worse - lawsuits. That's why you have those "this is a work of fiction and not based on real-life situation" disclaimers.
At first glance, there's really nothing that set this webtoon apart from other trashy sheikh/desert romance. A notable exception is that this webtoon CHOSE to use the name Oman, a real-life country with an extant Royal Family who are still in power, as the name of the in-universe country and CHOSE to reference Islam. This makes the webtoon too "realistic" and heavy for what, for all intents and purposes, is a typical romance webtoon.
Personally, I find this realism to be uncomfortable. I don't want to think about Oman or the situation in the Middle East or Islamophobia when I read a romance webtoon. I enjoyed a lot of other desert romances (like Amina and the Lamp, etc.), but this webtoon is too close for comfort.