You can set a substitute approver for yourself during your absence using the vacation settings available in Bezala's browser version.
Log in to Bezala's browser version.
Navigate to your profile through the main menu.
Check the box "On vacation now?" and select a user from the stand-in user dropdown menu who will substitute for you during your absence.
Save the changes you made.
Please note that the vacation replacement functionality needs to be turned off separately when you return.