A Project Owner can create, view and edit expenses on their projects, but require a user with Manager level permissions to authorise the expense. This setting can be beneficial for new, or junior users who require approval prior to incurring costs on a projects. At the base of the expense, you will be required to select the authoriser to approve from the drop-down menu.
When the expense is in a Submitted status, they will appear in the Expenses tab, but only form part of the project analytics once authorised.