it is a "Hi3518" type of camera. Use the boardsearch and you will find several posts.
Be aware that compatibility of firmware depends on a lot of components, not only cpu (wifi chip, camera chip, ...) so your milage may vary, you might even brick your device without a copy of the original. If it is possible to change the UI only, that might be less risky.
I don't have any experience with this type as I only own the vintage ones.