I used this:
import React, { Suspense, useEffect, useRef } from 'react'
import { Canvas, useLoader, useThree } from 'react-three-fiber'
let GLTFLoader
function Model(props) {
GLTFLoader = require('three/examples/jsm/loaders/GLTFLoader').GLTFLoader
const group = useRef()
const gltf = useLoader(GLTFLoader, 'glb/model.glb')
return (
<group ref={group} {...props} dispose={null}>
<mesh
material={gltf.materials.lambert2SG}
geometry={gltf.nodes.Object_3.geometry}
scale={[0.03, 0.03, 0.03]}
material-color=""/>
<mesh
material={gltf.materials.lambert2SG}
geometry={gltf.nodes.Object_4.geometry}
material-color="red" />
</group>
)
}