Apple TV and Netgear Modem/Router

Normally, go to Settings﹥Network﹥Wi-Fi﹥Choose a discovered network﹥Enter password﹥Done.

Do you get any errors when trying that? What does the error message say?

Is this about your home network? Is there something special about the network?

Also see: If your Apple TV can't connect to Wi-Fi - Apple Support

Sure, Apple TV 4K supports Wi-Fi (up to 802.11ac/up to 802.11ax).