If you don't already have the app, grab it from the link below so you can get started. This now includes your Wi-Fi network using Google or Nest Wifi products. The Google Home app is where is the magic happens when it comes to controlling all of your smart home devices. Other members in your Google Home will have the same control over the Wifi pucks as you.You will gain functionality like WPA3 security.Certain advanced features can still only be accessed from the Google Wifi app.You will not be able to undo this migration.You will still be able to use the old Google Wifi app to manage your network.You will not have to reset your entire network.You will have to factory reset at least one Google Wifi puck.But all of the common options are already there in the new Google Home app, so it would be a good idea to jump on board before the old Google Wifi app is phased out. You may still need the Google Wifi app temporarily for a few minor things like managing DNS.

Transitioning to the Google Home app will give you access to new functionality such as WPA3 security. Google is working on phasing out the dedicated Google Wifi app in favor of using the Google Home app for all your IoT needs. The transition can take time, and that's the case with the old Google Wifi system now that Nest Wifi is out. I typically recommend using Google WiFi in a router+firewall (NAT) mode, and then building your wired network off of the Google WiFi primary unit's LAN Ethernet port using unmanaged Ethernet switches. Google is known for merging older products into a new one's ecosystem for ease of use. I hope the above information helps you understand the behavior you are seeing.

Setup google wifi router