https://www.mangago.me/read-manga/lemon_pie_night/ (princess x knight)
https://www.mangago.me/read-manga/candy_moon/ (princess x knight)
https://www.mangago.me/read-manga/a_gift_for_you/ (princess x hero/knight; HEAVY dub-con, manipulation? it's kinda shit ngl but it does fit what you're looking for. also BAD END.)
https://www.mangago.me/read-manga/the_noble_lady_on_the_edge_of_the_cliff_wants_to_make_the_dark_knight_fall_in_love/ (aristocrat x knight)
https://www.mangago.me/read-manga/unaware_his_majesty_is_a_girl/ (side couple features princess x army general)
https://www.mangago.me/read-manga/indulging_a_crazy_beauty/ (princess x army general)
https://www.mangago.me/read-manga/last_boss_hime_wa_ikemen_yuusha_no_riakoi_eigyou_wo_kakerareru/ (demon princess x human hero)
https://www.mangago.me/read-manga/hero_s_marriage/ (princess x hero)
https://www.mangago.me/read-manga/if_you_can_t_kill_me_love_me/ (princess x assassin/spy)
https://www.mangago.me/read-manga/hitokiri_shoujo_koushaku_reijou_no_goei_ni_naru/ (aristocratic woman [I think she was a duchess or something?] in line for the throne x assassin/bodyguard)
God bless u n ur entire family
I pray for you to always get what you want
Any yuri where the princess falls for a female knight/warrior or a fighter local women. Historical yuris mostly