Is there any manga or manhwa where the male or female lead dies and gets reincarnated as a...

i thought about rec biting the tiger but it is the complete opposite of what you were asking lmao

its game-like rpg
female lead as a spider
https://www.mangago.me/read-manga/kumo_desu_ga_nani_ka/

there's these manhwas
but this one's a promo
https://www.mangago.me/read-manga/the_emperor_s_dog/

and these ones they didnt die but they became an animal
https://www.mangago.me/read-manga/a_strange_life/
https://www.mangago.me/read-manga/cavier_falcon_princess/

the rest i know are manhua

lol it's fine

Thank you for these :)