Ensure that your printer is properly connected to the USB port on the router.
Make sure that the USB cable is securely connected.
Verify that the printer is powered on.
Router Settings:

Access the router's web interface using a web browser. You usually do this by typing the router's IP address into the address bar. The default IP address is often something like 192.168.0.1 or 192.168.1.1.
Log in with your router credentials.
Navigate to the USB Printer settings or Printer Server settings.
Check if the printer is detected and properly configured. You may need to enable printer sharing or configure specific settings here.
Firewall and Antivirus:

Sometimes, firewall or antivirus software on your PC may block the printer utility from detecting the printer. Temporarily disable your firewall or antivirus and check if the printer becomes visible.