Manga/webcomics in the Yaoi/Shounen Ai category with themes of parenting or childcare. (Eg. Fathers, teachers, big brothers, etc!)
Warning: some stories contain Omegaverse and/or Mpreg, some starting without child but leading to having one or already having one. Please be aware!
List Part 2: (New additions are at the end of this list, older entries moved to list 2)
https://www.mangago.me/home/mangalist/1467153/