Are you facing some issues in viewing your older orders in Shipping Labels section?
Verify that the platform isn't showing the message "Your orders page contains more than 2500 orders, please archive the orders".
In that case, try to archive some orders, the older ones you were looking for should then appear by filtering all of them by date.
Click below to learn how to Archive and Unarchive your orders.
To automatize this process and let the system do it for you periodically, you can also set up a Cron Jobs, discover here how to do it!