okay so the main character is a blonde female and i think the setting is an isekai either reincarnation or time travel, shes one of the two candidates of being an empress or something. i think the second candidate/rival has green or brown hair i forgot, one day she saw the emperor and mc walking together and got mad(?) and another scene had her taking the mc's letter those are the only scenes i remember lol anyways later on she goes with him and fixes a problem and was given land to rule over as part of training of being an empress.

anyways i vaguely remember this i really hope someone can help me find this as i searched for days lmao thanks in advance

Is it "The Justice of Villainous Woman?"
https://www.mangaupdates.com/series.html?id=151835

wow thanks, it is that one.
i kept seeing it on a certain website but it didnt have many chapters for some reason do i ignored it, thanks again.