theres a list of omegaverse and theres a few with royalty
https://www.mangago.zone/home/mangalist/1455680/?filter=&page=1
Smyrna & Capri
https://www.mangago.zone/read-manga/smyrna_capri/
Keeper of the Pearl
https://www.mangago.zone/read-manga/keeper_of_the_pearl/
1Half Goblin
https://www.mangago.zone/read-manga/half_goblin/
Ou-sama to Puppy Love
https://www.mangago.zone/read-manga/ou_sama_to_puppy_love/
Willow love story
https://www.mangago.zone/read-manga/willow_love_story/
My Master
https://www.mangago.zone/read-manga/my_master/
Who's Your Daddy?
https://www.mangago.zone/read-manga/who_s_your_daddy/
Do you guys know of any more omega verse stories that have to do with royalty, like https://www.mangago.zone/read-manga/the_rogue_prince_is_secretly_an_omega/ or https://www.mangago.zone/read-manga/the_rogue_prince_is_secretly_an_omega/?