Hey @Neshkoda .
Google/Nest Wifi devices are not capable of having a VPN configured directly on them. The equipment the device would need would drive the cost up and it is far more advanced than most users will ever have the knowledge and/or desire to configure.
If you are wanting to run a VPN, it will have to be done on that device itself and is the best option. Keep in mind that VPNs will slow your network traffic down (device and network installed) due to how the connection works so it is not advised to install it on an entire network unless you have a specific reason to encrypt all traffic. IF you need all traffic from every device to be encrypted and use a VPN, you will need to move to an enterprise-grade solution that is designed to do so.
Please let me know if you have any further questions.
