Hello,
We checked the shaders and it seems that you are almost there, just missing a tag and a keyword in the virtual texture preset.
Simply change:
Tags { "Queue" = "Geometry" "IgnoreProjector"="False" "RenderType"="echoUnlit" }
To:
Tags { "Queue" = "Geometry" "IgnoreProjector"="False" "RenderType"="Opaque" "Amplify"="True" }
Since the shader you are using uses _NormalMap instead of _BumpMap, you will have to manually add it to the virtual texture.
Let us know if you run into any additional issues, we would be happy to help.
Thanks!