Yes. Use the Alternate User function. Note that you must set this up in PeopleSoft HCM (not Finance or Portal).
Directions: Log into Portal at https://peoplesoft.erp.sdcoe.net and click the HCM link. In HCM navigate to Main Menu > My Profile to select an alternate user for approvals for a specified date range. This is similar to an “out of office” setting. All of your approvals will route to the Alternate User during the date range you enter. Even if your organization is not using PeopleSoft HCM or you do not typically use HCM, you are still set up as a basic user in HCM and can enter this information.