How to Delegate Expense Approval in My Roles and Delegations

Hello, I need assistance with delegating expense approval tasks within the "My Roles and Delegations" section.

Could you please guide me on:

1. How to set up an expense approval delegation within the "My Roles and Delegations" section.
2. What steps are involved for the delegated approver to access and approve expenses?
3. Any specific configurations or limitations when delegating expense approvals?

Thanks,