ABO I’ve read

Top Alpha x Bottom Omega (not out of love)
5/5
Asuka and Yuzuki () over any other pairing here tbh
“ Yuzuki has a complex about being an omega male. His beta male cousin, Takuma, is in love with him, but Yuzuki can't accept his feelings. Every day is a bitter struggle. One day, Yuzuki has an encounter with alpha male Asuka, who happens to be Takuma's best friend. It seems that unbeknownst to Takumi, Asuka wants to take Yuzuki for himself...”

Top Omega x Bottom Alpha
5/5, don’t like 2nd volume.
“ Kaede (alpha) saves Azusa, an omega that was being bullied, and moves to another city right after. Many years later, they meet again and Azusa says that he wants to pay him back and that he'll do anything if Kaede gives him a chance. Fortunately or unfortunately, playboy Kaede just can't reject such an opportunity of amusement.”

Top Alpha x Bottom Omega
4/5
“ Prisoner Haga was tired of his boring life in jail and thought of staging a jailbreak! Just at that moment, an alpha prison officer was assigned to him...? ”

Not abo but instead canine/cat universe.
5/5
""I want to give my virginity to my ideal prince, Yukio-san, who's an AV actor!"
It's a world where humanity is divided into canines (dominants) and felines (recievers). Being one of the most common and numerous domesticated cat among the felines, Aoi Natsuyama's dream is to get married to his ideal prince! Aoi, who earnestly fell in love with the refreshing handsome wolf prince Yukio after discovering him in a DOG x CAT AV…”

Top Alpha x Bottom Omega
5/5
“Leo Asaka, an alpha male and a second-generation actor, hates it when people say he's just like his actor father. Leo is working hard to make it big on his own when he receives an offer to star in a film to be shot by a world-famous director. He then learns who his co-star is: Eito Yanagi, another alpha male and a second-generation actor who's known for living a scandalous life. The two of them get locked in a hotel room so they can get to know each other…”

Top Alpha x Bottom Omega
1/5 lame
“The plain alpha, Yoshihiko, works at a marriage counseling office. One day, a stern-looking delinquent omega, Momo, comes knocking on their doors to propose to him! After being turned down, Momo suddenly yells, "I'll do anything! Please, just go out with me!" and suddenly lunges at him!! Yoshihiko was turned on watching the delinquent desperately try to pleasure him. He wasn't any good, but when he looked up at him with watery eyes…”

Top Alpha x Bottom Omega
2/5 décent
“Daiki was a smart kid but on the day of their examination blood test to be performed and identify their gender, it turns out that he wasn't an Alpha but an Omega. Daiki was bullied as a child and became gloomy. In front of Daiki, he was weighed down by the gender gap and suddenly appears a High-Spec Alpha (Takizawa) who said he used to be Daiki's classmates. Daiki doesn't remember him at all and somehow he is wary of Takizawa's advancement…”

Top Enigma x Bottom Alpha
3.5/5
““I can’t believe that I, an alpha, am being embraced!”... Kuga Tsukasa is the heir to a great company. One day at a party he meets a man who appears to be the heir to the Amou empire. Tsukasa is about to use him for his own gain, but without realizing it Tsukasa is already underneath him in his bed!!!”

Top Alpha x Bottom Alpha
2/5 but a decent read
“An omegaverse story where an alpha from an elite family who hates omegas meets an alpha who is too carefree. Tsukasa is the ideal alpha: he was raised in an elite family and now works in his father's company. One day, he happens to meet Yoshiki, a fellow alpha and former high school classmate, who he once saw as a rival. However, he is surprised to discover that the aloof Yoshiki is living a carefree, unprofessional life…”

Top Alpha x Bottom Alpha
3/5
“ “Alpha” is a high-ranking official host club which only gathers alphas and specialises in leading gay partners. The No. 1 host, Ruca, and his cheeky underling, the No. 2 Leo, should be pairing up together with a regular, but…?!“