I had the same problem.
I tried to load .glb model in a react project (React version: ^18.2.0).
The solution for me was to insert the model to the public folder as mentioned before.
When doing so and using it like this:
const modelLoader = new GLTFLoader();
modelLoader.load("/assets/models/myModel.glb", ...rest of the code...
Everything works just fine.
P.S
- Make sure your camera is in the right position and can see the model
- Make sure you model is not too small or not too big