Check the video for more explain https://youtu.be/aMEu6FcdxFQ

Shader_DrawProceduralIndirect_Basic.shader

Shader "Eran/DrawProceduralIndirect/Basic"
{
    SubShader
    {
        Tags
        {
            "RenderPipeline"="UniversalPipeline"
            "RenderType"="Opaque"
            "Queue"="Geometry"
        }

        Pass
        {
            Name "Dev01"
            Cull Off

            HLSLPROGRAM
            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"

            #pragma vertex v2f
            #pragma fragment frag
            #pragma target 5.0

            StructuredBuffer<float3> VertexDataArray;

            // Structs
            struct V2F_Input
            {
                uint vertexID : SV_VertexID;
            };

            struct V2F_Output
            {
                float4 positionCS : SV_POSITION;
            };

            // Vertex Shader
            V2F_Output v2f(uint vertexID : SV_VertexID)
            {
                V2F_Output OUT;
                const VertexPositionInputs posGroup = GetVertexPositionInputs(VertexDataArray[vertexID]);
                OUT.positionCS = posGroup.positionCS;
                return OUT;
            }

            // Fragment Shader
            half4 frag(V2F_Output IN) : SV_Target
            {
                return half4(0.6, 0.3, 0.4, 1);
            }
            ENDHLSL
        }
    }
}

Can you post the full shader code?