Nanite of Urean Engine5 don't work on AMD Graphic Board.

I facing problemd Nanite don’t work on my Graphic Board producted by AMD.
My environment is follows,

  • PC: AWS g4ad instance
  • CPU: AMD EPYC 7R32
  • GPU: AMD Radeon Pro V520 MX
  • OS: Windows Server 2019
  • Instance: g4ad

I found that shader model of this Board is 6.5 but Nanite needs DX12 Shader Model 6.6 atomics, it’s too lower.
So, I set target RHI to Vulkan(1.3).
also, I installed AMD driver software version 27.20.11025.4019 from AWS.

But the meshs of static model that nanite is enabled in my application is too low poligon.

Why do occored this problem, and is there any solutio.