I am the ex-girlfriend of a soldier, it's not a big plot point but it happens, also in Seducing the villain's father the god of the novel's universe is the one that discovers that fl doesn't belong there.
https://www.mangago.zone/read-manga/happy_ending_for_the_time_limited_villainess/
slight spoilers//
Story is still ongoing but the brother finds out pretty early on and she tells him
Thank you! Even if it's a small plot device, I'll definitely check it out
Thank you for the recs!! They sound interesting!
Are there any isekai where other lead characters find out that the FL lived another life? For example, the father/brother/love interest finds out early on that they hurt/or were the cause of death the FL.