In some mobile device like samsung a22 . model is not displayed properly.
I am getting error like this,
" [THREE.WebGLRenderer: EXT_texture_filter_anisotropic extension not supported.]"
below is proper image of model.
below is image taken in phone which have rendering issue
Model is converted using gltf-pipeline to draco gltf.
For all materials on the model try setting material.side to Three.FrontSide. It’s kind of a wild guess - but mobile devices sometimes act weird with double-sided materials for absolutely no reasonable reason 
tried but same result