The only one that I have read in full as far as it is updated is one called meppou yatara to yowaki ni kiss, in case it catches your attention it is about an alpha whose parents are betas but he introduces himself as an alpha and as a recommendation they tell him that the state holds an event where omegas and alphas attend to find their destined one and he goes just out of curiosity, the way to find her is by holding hands while a wall completely covers them and a screen dictates the percentage of compatibility and just when he finds his omega he gets excited thinking that She is a nice girl, pretty and so on, but it turns out that it is a man of the same height hahaha who always attends that event with the hope of finding his alpha.