ppl are sleeping on this https://www.mangago.me/read-manga/yakuza_reincarnation/
This is newly created list and still working on it (=・ω・=) https://www.mangago.me/home/mangalist/1309318/
https://www.mangago.me/read-manga/middle_aged_man_s_noble_daughter_reincarnation/
https://www.mangago.me/read-manga/the_story_of_a_yakuza_boss_reborn_as_a_little_girl/
https://www.mangago.me/read-manga/jishou_akuyaku_reijou_na_konyakusha_no_kansatsu_kiroku/
https://www.mangago.me/read-manga/isekai_tensei_ore_ga_otome_ge_de_kyuuseishu/
https://www.mangago.me/read-manga/holy_idol/ (=・ω・=)
Maybe y'all have some underrated and hidden isekai reincarnation manhwas? I've read most of thr mainstream and you would usually see on the populars and on a lot of lists.
I'm trying to find for something really obscure and hidden. But actually is a treasure. Maybe you have some hidden gems over there please recommend me some(๑•ㅂ•)و✧