Model element "metarig_45" was exported to GLB with scale and moved position. You can download blender file from sketch fab and try export it again. Or scale object in code.

const metarig_45 = model.getObjectByName("metarig_45");
metarig_45.scale.set(1, 1, 1);
metarig_45.position.set(0, 0, 0);