Ummm was there kids she was taking care of? Also she's a runaway "maid" because she took those kids from their abuser..
I feel like I have read this one and can't recall the name ╥﹏╥
https://www.mangago.zone/read-manga/i_adopted_the_male_lead/
Anyways this one she didn't get engaged right away..
https://www.mangago.zone/read-manga/the_raven_duchess/
Gemologist. Duke proposed.
It might be this closest to your info but it's a contract marriage
OMG OMG THIS IS THE ONE YESSS. MY LIFE SAVEEEERRR!!!! Thank you so muchhhhh (づ￣ ³￣)づ(⌒▽⌒)
So its just popped out on my mind. I know i reas this and bookmark it but I cant find it. Mygooodness. So basically FL is an Jewelry Appraiser and ML is duke propose a engagement to her something in that manner. I forgot the apperanceeeeeeeeee