If you would try my standalone GLTF WebGPU viewer, found on the bottom of this post, and change r167 to r168 in all applicable spots (5 spots) then you could notice an error after loading some GLTF model that THREE.NodeMaterial.fromMaterial() function was removed.
Even if the sections with this function are commented out in the code then some new warnings will appear about MeshStandardMaterial and MeshPhysicalMaterial not being supported.
There could probably be more errors that might appear depending on what code in this viewer is changed.
EDIT: Just changed some code in this viewer and it is currently using r168.