ok so this is how it goes a male human dies (or something) and reincarnates as a daughter to shining armor and cadence with a twin sister (neither are flurry heart but both are alicorns) and we follow this human turned alicorn filly on a slice of life with her family

(note: I think it was canceled but I was unable to navigate FimFetch to find it)

https://www.fimfiction.net/story/262265/the-royal-fillies
It is canceled but it's two alicorn fillies skyla and inova human reincarnated.