Updating bounding box of fbx model

Questions
1

I recently changed my player from a simple boxmesh, to an fbx model, and I want to recompute the bounding box of it after transformations. I copied the old code I used to update the bounding box of a boxmesh, however that didn’t work. (playerMesh is the actual fbx model)
Here is my code

  const playerBox = new THREE.Box3().setFromObject(playerMesh);

  function updatePlayerBox() {
    playerMesh.updateMatrix();
    playerMesh.updateMatrixWorld(true);  
    playerBox.copy(new THREE.Box3().setFromObject(playerMesh));
    playerBox.applyMatrix4(playerMesh.matrixWorld);
  };