Past Life and Life (2020)

Nothing similar about story though but FL is same
And I like both the dramas...

The female leads from both dramas lose their memories.
Both are costume/historical setting dramas/not modern setting.

Both have a very meaningful message towards humanity and well structured plots. The two come with detective activities and have surprising hidden villains.
But TLLTM has a much better ending, though at first its pace is not as suspenseful and fast as Luoyang. It also focuses more on the romance side compared to Luoyang.