What is an issue?
Mesh nodes functionality of work graphs is supported since DirectX 12 Agility SDK version 1.715.0-preview. Also, mesh nodes requires shader model 6.9 and this is supported since version 1.717.0-preview. This means, both 1.717.0-preview version is needed to support both Mesh Nodes and Shader Model 6.9. However, currently, there is an unknown issue mesh nodes is not supported on version 1.717.0-preview.
Expected Causes
None.
Expected Solutions
Need to wait for the issue to be fixed by Microsoft.