Stuttering animation when lots of gameobjects

Hello,

so I have a panel that has multiple gameObjects as children. Think of it similar to an inventory where I need to display loads of items.

My problem is that during my entry animation of this panel, the animation kind of stutters/ doesn't look as smooth as for other panels. The problem is more noticable the more items I have in the inventory.

All objects are already instantiated and initialized. All I am doing is moving the panel to a new position (center of the screen) and increasing alpha of the canvas group to 1. I tried both the unity animatior and the lean tween asset and it still stutters.

Any tips on how to make the animation look smooth?