If you have a barcode printer skipping labels this may help.
I found this guide on the web
Load your Zebra printer with labels for your application.
Power on your Zebra printer.
Press and hold the Feed Button until it flashes two times, and then release it.
Allow your Zebra printer to complete feeding labels and printing a sensor profile.
Your Zebra printer should now be calibrated. To test – press the feed key and one label should be issued each time
If you still are having trouble this is an additional help. https://youtu.be/OgjEE3frPQo?si=wHSGsTl-J-SQLj-D