Here’s some I read myself, I believe they focus on family relationships alongside the normal story
https://www.mangago.zone/read-manga/the_monster_duchess_and_contract_princess/
https://www.mangago.zone/read-manga/screw_the_noble_life_i_m_going_home/
https://www.mangago.zone/read-manga/how_to_survive_as_the_devil_s_child/
https://www.mangago.zone/read-manga/i_became_the_daughter_in_law_of_the_villain_because_i_m_terminally_ill/
https://www.mangago.zone/read-manga/i_became_the_contract_daughter_of_the_soon_to_be_ruined_family/
https://www.mangago.zone/read-manga/the_wirepuller_gets_lucky_in_happier_years/
https://www.mangago.zone/read-manga/no_i_only_charmed_the_princess/
https://www.mangago.zone/read-manga/how_to_get_my_husband_on_my_side/
https://www.mangago.zone/read-manga/if_you_touch_my_brother_you_re_all_dead/
https://www.mangago.zone/read-manga/i_m_being_raised_by_villains/
https://www.mangago.zone/read-manga/today_the_villainess_has_fun_again/ (Not extremely focused around the family but the father and daughter duo are adorable together)
Welp that’s all I actually remembered liking so I hope you enjoy! (▰˘◡˘▰)
Tysm!
Isekai manhwas/mangas that focus on family (or just father-daughters)