if you're talking about historical manhwas about daughters then: http://www.mangago.zone/read-manga/suddenly_became_a_princess_one_day/?AsW1
http://www.mangago.zone/read-manga/the_youngest_princess/
http://www.mangago.zone/read-manga/please_throw_me_away/?gkxv
and for isekai/historical/etc type manhwas then:
http://www.mangago.zone/read-manga/shadow_queen/
http://www.mangago.zone/read-manga/actually_i_was_the_real_one/?hsGY
http://www.mangago.zone/read-manga/crimson_karma/
http://www.mangago.zone/read-manga/the_villainess_reverses_the_hourglass/
http://www.mangago.zone/read-manga/the_reason_why_raeliana_ended_up_at_the_duke_s_mansion/
http://www.mangago.zone/read-manga/trash_of_the_count_s_family/?qvqR
http://www.mangago.zone/read-manga/i_raised_cinderella_preciously/
http://www.mangago.zone/read-manga/beware_of_the_villainess/
http://www.mangago.zone/read-manga/death_is_the_only_ending_for_the_villainess/
i've read all of these and enjoyed them! some of these are revenge and not really romance-y but i hope you'll like them! ٩(๑❛ᴗ❛๑)۶
can someone recommend me manhwas like this minus the weird age gaps