AU (Dark?) Omegaverse Royal Techza β‘
The beginning of the story would be Odette and Derek type. Their parents engaged them since they were kids and neither of them are happy about it.
They as kids hate each other and force them to hang out and be together, which only makes the situation worse. But things change when they are teenagers, when they grow up and leave the grudge behind they start spending genuine time together, sharing their dreams and likes and dislikes. They realize they are more alike than they thought and become closer and closer.
And the flame of love ignites in them, especially in Phil. The bird boy went from loving the Piglin hybrid as far as possible to loving Techno more than anything and would literally cry if Techno didn't have his full attention on him.
His parents are obviously more than happy with the new development, but, there is still a problem. Techno had more "candidates" coming after him (According to Phil they were just jerks, they didn't deserve his Tech) but the problem was solved, as those candidates "disappeared" mysteriously....
A great pity... (and yes. Phil made them disappear) with no more stones in the way Phil was finally able to properly courting Techno.
And Techno also ended up head over heels in love with the blond Alpha. They ended up paired up and married when Techno was 21 and Phil was 23.
It was a huge and very beautiful wedding and if Phil had been allowed to do it he would scream to the world that Techno was his (he knew Techno would be angry if he did it... and he wants his beautiful husband happy), so he settled for showering his husband with gifts and caresses throughout the ceremony (love to see Techno blush).
Philza loves his husband with all his heart, he loves him so much that he would even kill and destroy kingdoms for him (he has already done it, even if Techno doesn't know it. Anyone who dares to speak ill of or upset his omega will pay dearly) but he is also a just and benevolent king/emperor (unless you speak ill of Techno) everyone loves him just as they love Techno.
Many monarchs would be moved that their Omega would have more favoritism among the citizens but Phil didn't care. He loved to see how everyone adored his beautiful, adorable and strong husband, he deserved to be adored.
Techno is also an excellent monarch, he fulfills his role as "Queen" in the best way. He deals mostly with political and social issues as he is better at keeping a cool head in those situations than Phil, as no matter what happened Techno would not flinch.
In this Phil is possessive and jealous as shit. He trusts Techno completely but he doesn't trust the people around Techno, so if he's not there making sure his beloved husband is okay, there's always more than one guard following the "queen" around the palace or the city.