you can try looking through the list of the beta to omega tag
https://www.mangago.me/tag/Beta+to+Omega/
you can try looking at the beta to omega tag
https://w ww.mangago.m e/ta g/Beta+to +Omega/
if you find pleasseee share （/TДT)/
kinda interested about what you're looking for (ノ≧∇≦)ノ
probably not this one but sounds really similar to https://www.mangago.me/read-manga/honey_trouble/
looking for Omegaverse that a alpha is in love with a beta and he slowly turns beta into a omega using his pheromones and it finally happens during a new years trip as they do the deed he suddenly goes into heat
also will like Omegaverse recommendations that have beta turning into omaga