From your post, I assume you have a router with both 2.4 and 5ghz. Are they using the same SSID and password? Is your phone connected to the 5ghz? If so, can you connect to the 2.4ghz on the phone? Are you certain you are using the correct SSID and password?
There isn’t anyway for the camera to detect the 5ghz network. It only has a 2.4ghz chip.
Recent link for a similar problem: