I read for my abandoned love recently and absolutely loved it but now I got nothing to rea...

Not exactly similar, but still otome isekai:

Another Typical Fantasy Romance
https://www.mangago.zone/read-manga/another_typical_fantasy_romance/

Cat in the Chrysalis (The FL does a lot for the ML, similarly to For My Abandoned Love)
https://www.mangago.zone/read-manga/cat_in_the_chrysalis/

As You Wish, Prince
https://www.mangago.zone/read-manga/as_you_wish_prince/

My Husband Hides His Beauty (funny and cute, a lot of action)
https://www.mangago.zone/read-manga/my_husband_hides_his_beauty/

Failed To Abandon The Villain (the guy also has long, white hair)
https://www.mangago.zone/read-manga/failed_to_abandon_the_villain/

Thank youu <3