Yes, you can edit a planned session in session waiting for approval before approving.
All you need to do is follow the steps mentioned below -
Go on the Track Support option from the side menu
Click on Sessions Waiting for Approval

Click on the Edit and Accept option and make all the necessary changes that you wish


Step 4 - Click on Accept and the changes will be saved. This session will be approved and moved from Sessions waiting for approval tab to Sessions already happened.
All you need to do is follow the steps mentioned below -
Go on the Track Support option from the side menu
Click on Sessions Waiting for Approval

Click on the Edit and Accept option and make all the necessary changes that you wish


Step 4 - Click on Accept and the changes will be saved. This session will be approved and moved from Sessions waiting for approval tab to Sessions already happened.
Updated on: 13 / 11 / 2021