Yes, DX9 is supported on Intel Graphics.
We use a D3D9on12 mapping layer which maps graphics commands from DX9 to DX12. We do extensive compatibility and performance testing, and partner closely with Microsoft* and ISV’s (Independent Software Vendors) to continuously optimize this solution. We have been shipping this solution since our 12th Gen Intel Core processor launch in 2021, and we will continue to invest heavily in this technology for both integrated and discrete graphics solutions.