Unreal Engine 4.23 Released!

[asdzxcv]

New: Storing Custom Per-Primitive Data
We now support storing data on a per-primitive level instead of per-Material Instance, enabling primitives to be automatically considered for dynamic instance drawing.

Storing data with Use Custom Primitive Data per-primitive has the advantage of lowering the number of draw calls required for similar geometry, even if each primitive were to have to have its own custom data.

How does this work ??
How can I add per primitive data ??