[m] Hello! I'm looking for a manga where an adult or high schooler dies or something and gets reincarnated into a fantasy world. I've read one before where she gets reincarnated as a little girl with purple eyes I think and another called Mushoku Tensei and finally one called Tensei shi Chatta yo.
It would reallly mean a lot if you helped. Thank you

Murabito desu ga Nani ka? is the only manga that came to mind.
The protagonist grows up in the first few chapters.

Ore no Shibou Flag ga Todomaru Tokoro wo Shiranai (Novel) fits the description as well and places a huge importance on the future and what actions growing up influence it.
However it is a light novel ...

Thank you! I'll try reading both

Ascendance of a Bookworm/ Ascendance of a Bookworm (Novel)
Tenseisha wa Cheat o Nozomanai / Tenseisha wa Cheat o Nozomanai (novel)
Isekai Tensei Soudouki
Otome Game no Hametsu Flag shika nai Akuyaku Reijou ni Tensei shite shimatta... / Otome Game no Hametsu Flag shika nai Akuyaku Reijou ni Tensei shite shimatta... (novel)

Ok, so here my recs... the thing is though, most of the mangas are adaptions of the light novel, soooo.. i linked both.
anyway the first two are more slice of life, as the main characters (females) try adjusting to the new world they were reborn in. These are similar to the one you read with the purple eyed girl (E? Heibon Desu yo??)
The third one is the only one with a male main character.. and he's more of a pre-teen rather than a child...
And the last one is a silly reverse harem one. Its mainly comedic XD

Thank you sooo much I checked them out and they look great! I'll start reading them😊