I very much doubt, Hollie24, that the courts of The Netherlands and Denmark are less informed about the etiquette of the Jordanian Court than are you. Given the obvious affection that the royal couples of Jordan and The Netherlands evinced for each other, I think we can assume that Maxima's dress was acceptable to them. After all, it was only marginally more revealing than that of the bride, the King's mother, Princess Muna, and his sister-in-law, Princess Zeina.

(scroll down
https://www.thecourtjeweller.com/2023/06/incredible-tiaras-at-the-jordanian-crown-princes-royal-wedding-banquet.html#more-47670)

The whole wedding, it seemed to me, highlighted the secular (progressive) nature of the Jordanian Court. For example, almost most none of the Jordanian royal women had covered their hair. So many men and women - who were not related to the King and Queen and the Crown Prince and Crown Princess of Jordan - kissed them - men to women and vice versa.

This relaxed protocol seemed also to have been coordinated with the other Middle Eastern (and overtly pious, observant) rulers. All of the Moslem Rulers of the world, almost none of whom are related to the Queen and Crown Princess of Jordan (the exceptions being a small number of the Crown Princess's Saudi cousins) shook hands with the Queen and Crown Princess (that is, touched in public women to whom they are not related). Indeed, the most obvious refusal to touch was that of the Queen of Malaysia who, having shaken hands with the King did not shake hands with the Crown Princess's father. (She was also the most piously (?) dressed of all the Muslim women I saw - stitched up to resemble a broken leg.

Similarly, I doubt that CP Mary's off-the shoulder gown was an ill-considered accident. If you look at the bride's gown in the link above she is showing a lot of shoulder for a Muslim (or a Catholic of my cousin's generation).