I agree with you on this that thing genuinely pmo sm but here are some stories where the father loves all his children equally
https://www.mangago.me/read-manga/the_white_tiger_clan_s_baby_cotton_ball/
https://www.mangago.me/read-manga/baby_snow_leopard_of_the_black_leopard_family/
https://www.mangago.me/read-manga/it_s_my_first_time_being_loved/
https://www.mangago.me/read-manga/the_villainess_is_shy_in_receiving_love/
https://www.mangago.me/read-manga/a_saintess_who_was_adopted_by_the_grand_duke/
right? like i feel bad for the son they'll give is stories about twins but they always make it obvious that the twin sister is the MAIN character and the twin brother is just "uh... the main character too ig...?"
Everytime I read a cute father daughter manwha there’s always brothers involved and they’re all INSANELY emotionally neglected like to a concerning degree. Your son is supposed to be as EQUALLY cute as your daughter manwha!! You’re suppose to hold and love your son too!!