Functional or dysfunctional, doesn't have to be slice of life, but some fluff is preferred. Can be even something like I Bought a Girl, which doesn't really have a family but has a nice fluffy father-daughter like relationship.
Not novels but if you are ok with webcomics or webtoons: I am a child of this house The Archmage's Daughter
https://www.novelupdates.com/series/isekai-yururi-kikou-raising-children-while-being-an-adventurer/ Ossan (36) Ga Idol Ni Naru Hanashi Since I’ve Reincarnated as the Villainess’ Father, I’ll Shower My Wife and Daughter in Love Wishing Happiness unto an Idiot Sister