If you are an approver, you may find it unnecessary to have the orders section of the mobile app visible. You can hide it.
The mobile app menu is in the top right corner – the classic hamburger menu icon. Click this and then select the “My Default Settings”. Under “Purchase Order List View” you can choose None. This will then hide the orders section.
If you ever need to revert this, just go back in and change the Purchase Order List View to anything other than none.