Don't if that's exactly what you're looking for but here's some recs:
https://www.mangago.me/read-manga/36_hours_until_the_villainess_s_downfall/ (it's a one shot)
https://www.mangago.me/read-manga/in_her_fifth_life_the_villainess_lives_with_the_evil_dragon_the_evil_dragon_of_ruin_wants_to_spoil_his_bride/ ( kind of dark)
https://www.mangago.me/read-manga/the_villainess_is_done_trying/
https://www.mangago.me/read-manga/the_tragedy_of_a_villainess/ ( rushed ending)
https://www.mangago.me/read-manga/choudokyuu_cheat_akuyaku_reijou_no_karei_naru_fukushuutan/
https://www.mangago.me/read-manga/with_one_day_left_i_ll_break_all_the_destruction_flags_serves_you_right_rta_24_hour_record/
https://www.mangago.me/read-manga/konyaku_haki_no_akui_wa_shoukan_kara_okaeshi_shimasu/
https://www.mangago.me/read-manga/akuyaku_reij_tachi_wa_yuruganai/
https://www.mangago.me/read-manga/the_rubelia_kingdom_s_tale_i_ended_up_cleaning_my_younger_cousin_s_mess/
https://www.mangago.me/read-manga/the_one_within_the_villainess/
This is just an example but the guy and girl are engaged but the guy does not focus on the girl but some other girl and ignores the actual girl
I really wanna get recommendations of this type of Mangas not manhwas also sorry about my English it's not my first language (≧∀≦)