PCD3D_SM5 means “directx 11 class graphics” (shader model 5)
PCD3D_SM6 means “directx 12 class graphics” (shader model 6)
If your only graphics is Intel HD 620, you’re stuck on DX11 class graphics (shader model 5) even though the D3D 12 API might be installed – the hardware simply can’t make use of it.