What Role/Privilege is required to Enter a Role Delegation created on behalf of the Delegator?

Summary:

We are looking to utilize the Role Delegations under User Account. We have a use case where we are looking to add a role delegation for our Accounts Payable Manager to be delegated the Accounts Payable Supervisor role during vacations/absences to be able to Submit Payment Process Requests since that role is required to do so. We have been succesful in testing by having the user delegate but if the user with the Accounts Payable Supervisor Role is out unexpectedly, is there a way to enter on their behalf?

Content (please ensure you mask any confidential information):

When navigate to the User Account and Roles and Approvals Delegated to Others and click on the + to add a Delegation Rule there isn't an option to Delegate a specific role.