Thanks.But the update actually says it supports foliage:Support for hardware instancing on iOS and many Android devices, reducing draw calls for Foliage and InstancedStaticMeshComponents.Also,I found that the default foliage painting is just using the foliageInstancedStaticMeshComponent:
And since my map is an outdoor scene,I cannot use instancedstaticmesh blueprint to add every grass or tree instead of foliage painting…