can you help me?, generated the certificate on the printer and installed it on the iPads, and added it as a trusted certificate, but it keeps giving me the error.

To resolve this, you will need to:

Generate an SSL certificate for the printer.
Export the certificate.
Import the certificate into the browser or device (OS) you are using to access the printer.
Restart your browser and device after the certificate is imported.
Note: The certificate import process varies depending on your operating system (Windows, Linux, macOS, etc.).

Here is a test case video for the process on Linux:
https://drive.google.com/file/d/1gjxKmrliDrjge9TencdPOH5xWHnQTF5a/view

This documentation includes detailed steps on how to generate and import the certificate based on your OS.
https://www.odoo.com/documentation/18.0/applications/sales/point_of_sale/configuration/epos_ssc.html#self-signed-certificate-for-epos-printers

Once you've completed these steps and restarted the browser/device, the printer should work as expected.

Thank u so much!, worked it!