Mapping Roughness metallic AO texture maps from GLB file

Questions
,
1

Hello guys, I need to map Roughness, Metallic, and AO texture maps with single roughness/metalic map which are stored in a GLB how to do that I am using below lines of code

const mat = new THREE.MeshStandardMaterial({
                        roughnessMap: child.material.roughnessMap,
                        aoMap: child.material.aoMap,
                        metalnessMap: child.material.metalnessMap
                
                    })
                    console.log(child.material);
                    if (value === 'normalMap') {
                        if (child.material.normalMap) {
                            child.material.map = child.material.normalMap;
                            child.material.needsUpdate = true;
                            console.log('Normal map exist');
                        }
                    }
                    if (value === 'alphaMap') {
                        if (child.material.alphaMap) {
                            child.material.map = child.material.alphaMap;
                            child.material.needsUpdate = true;
                            console.log('Alpha map exist');
                        }
                    }
                    if (value === 'aoMap') {
                        if (child.material.aoMap) {
                            child.material.map = child.material.aoMap;
                            child.material.needsUpdate = true;
                            console.log('AO map exist');
                        }
                    }
                    if (value === 'emissiveMap') {
                        if (child.material.emissiveMap) {
                            child.material.map = child.material.emissiveMap;
                            child.material.needsUpdate = true;
                            console.log('Emissive map exist');
                        }
                    }
                    if (value === 'roughnessMap') {
                        if (child.material.roughnessMap) {
                            child.material.map = child.material.roughnessMap;
                            child.material.needsUpdate = true;
                            console.log('Roughness map exist');
                        }
                    }
                    if (value === 'metalnessMap') {
                        if (child.material.metalnessMap) {
                            child.material.map = child.material.metalnessMap;
                            child.material.needsUpdate = true;
                            console.log('Metalness map exist');
                        }
                    }

and also I created new mesh standard material and assign but it didn’t work, Thanks for your time