@JWallace
Google Nest does not make it easy to change a Wi-Fi network name (SSID) or password. In fact, when getting a new router/modem, they recommend setting the Wi-Fi network name (SSID) and password to the same values used on your old router/modem. That's what we did when we got a new router/modem, and we didn't have to make any changes to our Google Nest devices.
Google's basic recommendation (see link below) when changing Wi-Fi settings is to remove the devices from the Google Nest app or Google Home app while using the old Wi-Fi settings, then do a factory reset, then switch your mobile device to the new Wi-Fi settings, and then re-install the devices. Since many customers don't remove their device while they are still on their old Wi-Fi, they end up having various problems and need to contact Support (https://support.google.com/googlenest/gethelp) for assistance.
https://support.google.com/googlenest/answer/9223711?hl=en#zippy=%2Ctry-the-same-network-name-and-pa...
