Ohhh one of my favorites
These are all GLs:
https://www.mangago.zone/read-manga/oshikake_nyobo_kodomo_tuki/ (MC and FL raise their biological daughter)
https://www.mangago.zone/read-manga/ohana_holoholo/ (MC and FL raise the FL's biological son)
https://www.mangago.zone/read-manga/ebisu_san_and_hotei_san/ (MC and FL raise the FL's niece)
https://www.mangago.zone/read-manga/flower_of_youth/ (MC and FL raise the FL's son)
https://www.mangago.zone/read-manga/umineko_sou_days/ (MC and FL raise the FL's niece;incestuous side couple)
https://www.mangago.zone/read-manga/mama_mama_amano_shuninta/ (MC and FL raise both their children together; one-shot; cheating)
https://www.mangago.zone/read-manga/shiori_and_yuki/ (MC and FL raise the FL's daughter; one-shot)
bl/gl where they adopt a child and raise it together (no omegaverse if possible ty)