These both are historical manhwas. I couldn't find any modern manhwas with long white hair ml
https://www.mangago.zone/read-
manga/the_duke_of_ashleyan_s_contractual_marriage/
For my abandoned love
https://www.mangago.zone/read-manga/for_my_abandoned_love/
https://www.mangago.zone/read-manga/the_virgin_witch/
here ML changes between short and long hair https://www.mangago.zone/read-manga/i_became_the_villainess_in_an_anticlimactic_novel/
https://www.mangago.zone/read-manga/the_duke_s_teddy_bear/
https://www.mangago.zone/read-manga/the_villain_discovered_my_identity/
https://www.mangago.zone/read-manga/the_slave_girl_and_the_vampire_with_a_death_wish/
straight romance manga/manhwa with shoulder length or longer white hair ml pls help me out