Under the Power (2019)

Both about solving mysteries and helping the state
Both FL and ML involved in solving mysteries
Both FL and ML don't get on initially

Both the FL are similar in personality
Both have a love triangle
Both FL can fight
Both the ML are highly intelligent
Both ML are highly respected and have a high status
Both FL are smart
The stories are not super similar but at some moments it has similar vibes
Under the power is more about solving crimes and TMBFY is about the FL entering the martial word and about the different clans involved.
I would recommend both as they have a good romance and have a mainly good plot.

I've Fallen For You is similar to Under The Power:
* there's a character with unknown royal origin
* a secret in the past that binds the ML and FL together
* the FL works for the police, she's doing forensic research
* the ML isn't impressed by the FL in the beginning

The differences:
* Under The Power has a slow burn romance, I've Fallen For You has romance right in the early years of the leading couple
* Under The Power is much darker with a real bad ass antagonist
* The father in Under The Power has done some shameful things, the father in I've Fallen For You is honest and supportive

Same main character actress (Seven Tang).
Under the power much much better whereby the male lead aint having multiple wives and concubines and they dont portrait the internal harem fights.