Not quite. They are network linked through Tailscale but typically running through a Mullvad VPN exit node. The NextDNS is baked into Tailscale too.
This gives me access to my home devices (including self hosted services, etc.) from out and about on the secure Tailscale network and connect to the Internet through a Mullvad VPN connection but that is further supported by the NextDNS which ensure devices are blocked from ads, trackers, telemetry, etc.
I only chose this route because I want an easy way to manage my whole network of connected devices without having to do a setup on each one individually.
Don’t get me wrong, there may be a better way but this has just worked well for me.