No, you can’t use a free VPN with Google Nest WiFi because free VPNs don’t support routers. Even if you find one such free VPN, it’d be extremely unsafe to count on it, especially with routers. Free VPN servers often use unethical practices to make money, like selling your private data to third parties, so relying on a free VPN for all the mesh-connected devices would be extremely risky. Instead, go with one of the many reliable cheap VPNs like Surfshark, CyberGhost, or PIA.