These are some recs where the Omega is fairly tough/ confident... Tho most of these are popular so it's possible you read all of it or some (=・ω・=)
https://www.mangago.zone/read-manga/shima_chanchi_no_tsugaijijou/
https://www.mangago.zone/read-manga/amaenbo_honey/
https://www.mangago.zone/read-manga/megumi_and_tsugumi/
https://www.mangago.zone/read-manga/abarenbo_honey/
https://www.mangago.zone/read-manga/unromantic/
https://www.mangago.zone/read-manga/like_a_tidal_wave_from_pheromone_shower/
campus trap, he is a dom omega but he doesnt really act like it tho
< Minmotion Syndrome > as well.
Unromantic
Looking for a manga/manhwa with a dominant omega as mc. I feel, I only ever find omegaverse with recessive omega or a beta mc and I want a change