Responses
I dunno the first one but the second probably Peerless Dad ( https://www.mangago.me/read-manga/peerless_dad/)
not sure but i remember from ur desc is doctors rebirth
it is! tysmm(≧∀≦)
it was an action manhwa and the art style was like that one bowblade smtg manhwa all i can remember is that the mc was trapped in a cave and he learned how fish and survived in the cave he also learnt some martial art technique by watching the waters flow. oh and ig his father was a slave gladiator sorta guy.
and the other manhwa I'm searching is had a father who had 3 children's 1 girl 2 boys and their mom was dead so he took care of them it was also an action manhwa