Apple TV connectivity

Apart from the above, here are some other troubleshooting steps for getting a Wi-Fi internet net connection working:

1. If your Apple TV can't connect to Wi-Fi - Apple Support
2. Try the ‘Other…’ option instead of selecting a listed discovered network. Especially if the password has been changed.
3. For Apple TV (4th generation or earlier), verify that the router or access point isn’t set to use WPA3, as only device models from ~2018 or later may support that. Instead use ‘WPA2/WPA3 Transitional’ on the router.

Could it be that this network has captive portal network access, which requires both a username and a password, instead of only a password? Not many home networks have that, but it is more common on semi-public networks, enterprise and educational institutions, stores, communities, some apartment buildings, rentals, hotels, motels.

A device profile could be configured with those needed access details included, as it is not accessible through the regular interface. It can be a solution for semi-permanent setups. For frequent changing settings or networks, it would be better to use a ‘travel router’ in between the present network and your devices, so that Apple TV doesn’t have to deal with the captive part.

What is your model Apple TV? Identify your Apple TV model - Apple Support

Current models Apple TV with system software version tvOS 15.4 or later can use an iPhone or iPad to help bring network access to Apple TV, when facing captive portals.