Hi! I would really appreciate it if someone could help me find the title to this work. I forget whether it’s a novel or a webcomic, but I remember the general premise. As a whole, the work was shojo, but the FL transmigrated into the body of a princess that she thought was ‘too nice.’ This because she transmigrated into a BL novel where the main couple is her brother, the crown prince, and another man, and in the original story line, the sister bears a child and gives up on her own love life so that her brother and the other man can get married and still continue the familial line. In the world of the novel there were two factions: the BL side and the marry a woman (but maybe have a male lover on the side) faction. I think the princess also had a guard who she just straight up assumed was into men because all of her previous guards quit after finding a husband so she didn’t want to get attached to this on (where I was in the story implied that the guard was into her tho).
“I'm an Opportunistic Princess in Charge of Solving Things” (name of the manga) https://www.novelupdates.com/series/i-am-a-princess-responsible-for-settling-circumstances/ (novel link)