Fated to Love You (2023)

Both are historical mini dramas in which through some fate of birth (sixth daughter vs. twins) the FL's existence is considered a threat to the kingdom for which she was supposed to be killed at birth, but her parents protected her by either disguising her as a boy or hiding her. The FL somehow ends up married. Both MLs are devoted to the FLs and learn her secret before anyone else.

Both are very similar:
Arranged marriage
Wrong bride
The wrong couple falls in love during the relationship
There are betrayal plots inside the family and the new bride helps the husband

Both dramas have twin sisters with different personalities. One of the sisters is gentle and kind while the other is lively and naughty.

Both are historical mini dramas and have the similar concept of a marriage mix-up of some sort with the FLs being the favored and less favorite daughters of the same family. In both, despite the switch or mix-up, the marriage(s) end up being (a) perfect match(s).

Both are about identical twin FLs with very different personalities. Due to an accident, the spirited twin ends up married to the ML in place of her sister.