See this discussion thread : https://discussions.unity.com/t/why-do-uv-channels-above-uv1-appear-black-in-shader-graph-unity-6-5/1706966]

Steps to reproduce:

1. In a project with shadergraph, when editing a shadergraph
2. Create a node with UV input dropdown (UV, Tiling and Offset, Rotate ...)
3. Select any other UV than UV0

Actual results: 
The preview display is black.

Expected results: 
The preview display should be the same as UV0.

Reproducible with versions: 6.5.0a6, 6.3.0f1

Not reproducible with versions: 2022.3.62f3

Can’t test with versions: 

Tested on (OS): Windows

Notes: