Lemme know when you find one
You can read "Baby Snow Leopard of the Black Leopard Family" this one
"The Dutiful Kid Who Saved the Villainous Family" she technically is one, she was a child before reincarnation iirc
These FLs are also kids:
Dungeons and Crayons
Baby Cat Who Commands the Dog Clan
Can I Cry Now?
A Secretly Capable Child Is Seeking For Her Dad
Just put them in the search bar in mangago
I really love this story and would love to read more like it, where the kids are actual kids