Funnily enough there is a chinese novels exactly like this where Mc go back to the past and adopted his past self. However I dont remember the name cause I wasnt interested in it back then
Oh yes it's something like i went back 20 years and raised myself or something lol good read
Just to sure it’s this one right :
https://www.novelupdates.com/series/transmigrated-to-twenty-years-ago-and-adopted-myself/?
Yep yep this one but it's not completed on nu just so you know if i remember correctly i read the mtl
This reminded of a naruto fanfic where he time traveled back to the past and ended up raising his younger self HHAHAHHAHAHA