I was faced this same issue but this guide help me and also found some interesting things you may love it.
Are you able to print a configuration page to verify the machine is online? Can you ping it? Can you open the web interface in a browser? How is your print queue configured?
I have the same problem, that my printer is not detected, but I have the problem in Windows 10, not when updating to windows 11 as most people. Any idea? I also have not a second ethernet portal - used already