oh and I meant a female mc!!
White blood
Hero killer
Hand jumper
https://www.mangago.me/read-manga/uglyhood/ (think one punch man)
https://www.mangago.me/read-manga/black_serpent/
https://www.mangago.me/read-manga/st_r_strike_it_rich/ if it helps, everyone in the main cast is a girl, and all of them are insanely overpowered.
https://www.mangago.me/read-manga/a_married_killer/
https://www.mangago.me/read-manga/maru_is_a_puppy/ kind of...idk it's ike,, maru (the MC) is not from an action-genre with intense levelling up, but she frankly IS the most over-powered FMC from the getgo
https://www.mangago.me/read-manga/legal_pirate_parfait/ (this...kind of maybe matches what you're asking for? not really but...)
https://www.mangago.me/read-manga/aftergod/ (honestly, this isn't the OP fMC, she's more of those shonen protags who are weak at first even tho they're op as beginners. but it goes crazy, so idk, i'll put it down)
Oh my god ily thank u
hi I'm looking for a manga with a super duper strong mc and I don't mean those historical mangas and stuff I'm likely looking for one similar to solo leveling and I don't want to get hurt so I I maxed out my defense kind of genre!!