I bought a Google mesh wifi point to add to my existing system but gave no idea how to add it. I’m trying to migrate my network from the now-defunct Google-wifi ap to the new Google Home Ap but the new Ap doesn’t seem to
have a simple “add wifi point” link.
Do you see a green Wi-Fi icon in your Google Home app? If not, you might have to factory reset your existing pucks using the physical button ( https://support.google.com/googlenest/answer/6246619?hl=en ) and set them up from scratch ( https://support.google.com/googlenest/answer/9548301?hl=en ). If you reuse the network name (SSID) and password, your devices should reconnect automagically.
And since iOS is mentioned.
Make sure the device used for the setup process with the Google Home app have no VPN enabled/ connected; not any 3rd party product, nor the "Apple iCloud Private Relay" ( https://support.apple.com/en-us/HT212614 ).
Make sure the Google Home app has been granted permission for "local network access" ( https://support.google.com/chromecast/answer/7172427?hl=en ).
Make sure that proxy is set to disabled while connected to the Nest Wifi network ( https://www.expressvpn.com/support/troubleshooting/disable-proxy-safari/#ios ).
When adding additional points: IPv6 on Nest Wifi has caused strange problems lately. One thing to try is to disable IPv6 ( https://support.google.com/googlenest/answer/6361450?hl=en ), add new Nest Wifi unit, then leave IPv6 off or enable it again.