A manga, not a manhwa, but Mushoku Tensei ~Isekai Ittara Honki Dasu~ is very good. It's similar to this and has an anime adaptation coming out next year.
try solo leveling, you dont watch him grow up but its from weak to strong real quick you wont regret it and the mc is a total badass too
Definitely recommend Omniscient Reader's Viewpoint novel, it's completed and you see the growth of the protagonist. https://boxnovel.com/novel/omniscient-readers-viewpoint-boxnovel/
Omniscient Reader's Viewpoint is so good! I'm about halfway through the novel and I'm loving it.
Does anyone know any similar manhwas like a fantasy world and we watch the mc grow up