To expand on my girl sad about her arranged marriage trope post, I think the trope can be subverted (woman is happy about arranged marriage) but it can also be done well and without modern sentiments (ew, sex with someone I don't love is yucky/I want to marry for true love/I want to be a GirlbossTM)
For example, princess is sad about her arranged marriage because:
-Her nation and the prospective husband prince's nation were at war five minutes ago and many members of her own family died in the war. The marriage is designed to cap off a peace treaty but what happens if peace doesn't last and she finds herself the queen of a nation at war with her own homeland? If you want real angsty enemies to lovers, the prince himself killed her own brother in the war.
-The nation the princess is marrying into is very culturally different from her own, very far away/a dangerous journey, and she hasn't been able to learn the language. She will be bringing some of her ladies-in-waiting but fears being very homesick in a place so different from her homeland.
-The princess already married for political reasons and her husband has now died. This time she wants to make her own choice because she's paid her dues (there is historical precedent for this)
-Princess has known her future spouse since childhood and was happy to marry him, he died suddenly and now she's being asked to marry his weird younger brother whom she knows well and dislikes.
-Princess is heavily prejudiced against the nation she is marrying into because of racism/xenophobia or whatever but they have a resource her kingdom needs and a baller army, so marriage it is! She overcomes her pride and prejudice as she falls in love with her husband.