The following article outlines how to create a group and add an approver for payments.
Steps:
You must be a Superuser or have custom permission to Manage Approval Routing to perform the following steps.
Navigate to Settings → Manage Approval Routing
Click on the Payments tab
Click on Create New Group
Input the Group Name and select Add
Next, click on Add User To Group
Input the Approver, Level, Approver, and Threshold
Once you've filled out the information, click Add.
Great work! You've created a new group and added an approver. Continue adding approvers until you've created your group.