Which roku device is it specifically?
Some of these devices operate only at 2.4gz network band, and others, like your RokuTV can operate on both the 2.4gz and 5.0gz bands.
Also, is your device "seeing" the network but not connecting to the network. Is the device seeing the network, but not connecting to internet.
Network connection and internet connection are going to be different things.
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102