I'm a newbie in Blender and probably this's a question asked dozen of times but answers found around will not apply to my problem ... I'm trying to enable smooth shading for the mesh in this project and I'm unable to do so.
The original mesh was imported from a
.glb file I did not mess around with materials or other properties.
This's the mesh as it appear after enabling
I have some other meshes imported from different formats (
.ac3d) where I can change between smooth and flat without any problem: