3D Object Animation Poor Performance (Mixamo Animated Character)

A simple low-poly 3D Character playing just a small Idle Animation of 8 frames is using over 60% Processing.

Animations and rigging is created using Mixamo.

Probably it is running at the current fps of my pc. It performs too poor in mobile.

Is this because of the number of bones?

When I have animations- CPU usage >80% and 120fps

When I remove the animations, CPU usage goes down to 20% and 180fps

Any advice on this topic would be great to hear. Thanks.