Repro steps:
1. Create a new URP or HDRP unlit shadergraph
2. Open it, and in the Graph Settings select the URP or HDRP target, scroll to the bottom, and enable 'Support VFX Graph'
3. Save the ShaderGraph
4. Create or open an existing VFX Graph
5. In its output, click to assign a ShaderGraph
6. Observe the SG created in the above-mentioned steps is not visible in the searcher

Expected outcome:
All compatible ShaderGraphs to be displayed.