There is a tool at the Project level titled Variations.
Within the Head Contracts and Commitments tools, there are subtabs titled "Variations".
This FAQ outlines the difference between the Variations tool and variation subtabs.
The variations subtab is located within the Head Contracts and Commitments tools. Within the Head Contracts or Commitments tools, you can manage Potential Variations, Variation Requests and Head Contract or Commitment Variations.
The project's Variations tool is designed as a collaboration area with your client and contractors on Head Contract and Commitment Variations, but will not show a list of Variation Requests and Potential Variations.