Rotation property animation for a GLB Model doesn't work

The Animation works perfectly for mesh created using MeshBuilder.CreateBox. but
the rotation animations just don’t work for the GLB mesh.

var animationTurnRight = new BABYLON.Animation(“MyAnimationMove”, “rotation.y”, frameRate,
var turnRightKeys = [
frame: 0,
value: 0
frame: 4*frameRate,
value: 0.5
scene.beginDirectAnimation(anim_model, [animationTurnRight], 0, 5 * frameRate, false,1);

are you sure you are animating the right model? gltf models offer more than one mesh in the hierarchy

you can use to see how it looks like