When I export the scene as glTF 2.0 file format, it exports it with textures, but without any material information like specular-ness. I literally set it to 0 in principled BSDF, but when it's exported as glTF 2.0 .glb file it exports without that material setting.
Above is my node settings in shading tab.
And this is the result, which shows it exported without material information.
Thanks in advance.