Let’s get the devices identified first.
After you connect a device to the router, start a browser on the device and open the router admin page. Usually this is http://192.168.10.1, but if you’ve changed the LAN IP address, adjust the IP address accordingly.
You’ll see the login page. Click on the link “My local IP address” – you’ll see the device’s IP address.
On the computer you use to manage the router, login the router admin site. Check the list of connected devices. Do you see the above IP address in the list?