Yes, you can change the order of pickups and deliveries while editing stops.
To do this:
Go to the stop you want to update.
Click on the three horizontal dots (⋯) next to the stop.
3. A menu will appear, click on Edit Stop.
4. The right-side panel will open.
5. Go to the Other Info tab.
6. Under Stop Type, select whether you want it to be a Pickup or a Delivery.
7. Click Done to save the changes.