thanks in advance :)

https://www.mangago.zone/read-manga/reminiscence_adonis/
https://www.mangago.zone/read-manga/baraou_no_souretsu/
https://www.mangago.zone/read-manga/special_a/ (one sided rivalry)
Purple hyacinth (available on webtoon. Free. And one of the best enemies to lovers)
https://www.mangago.zone/read-manga/ou_no_kemono/ (one sided hatred)
https://www.mangago.zone/read-manga/reimei_no_arcana/

Not all webtoons, but if you’re ok with manga too, this is my list (:

https://www.mangago.zone/home/mangalist/1744532/