Recommend

I wanna know too, the only father-son duo kinda stories i found are these two

https://www.mangago.me/read-manga/on_the_way_to_meet_mom/

https://www.mangago.me/read-manga/i_ll_retire_after_saving_the_world/ (hunterverse time travel, adoptive-father-who's-no-longer-his-father drama & younger version of MC becomes his lil bro)

I have a list for more family focused stories with a male mc! https://www.mangago.me/home/mangalist/2654897/
Among these the ones that most fit your request are probably:
https://www.mangago.me/read-manga/i_ll_retire_after_saving_the_world/
https://www.mangago.me/read-manga/estio_1/ (it takes a long time for the father to appear and realize he's his son but once he does it's gonna give you diabetes TT read the novel though because the manhwa is half dropped)
https://www.mangago.me/read-manga/elqueeness/
https://www.mangago.me/read-manga/on_the_way_to_meet_mom/
https://www.mangago.me/read-manga/please_be_my_daddy/ (it's NOT bl!!)

Honorable mention:
https://www.mangago.me/read-manga/the_youngest_has_many_secrets/ (not a male mc but a cross-dressing fl, and the dad thinks she's a boy for a good part of the novel)