I use Tailscale (or the fully-self-hosted Headscale) to ensure all my data is routed through my home whether my phone/laptop is on cell data, public wifi, or otherwise.

One can also simply use it to ensure communication between specific devices is always secure and available but I also find it quite useful as a way to secure all my data when away from home.

It's free for 5 users/100 devices per account with virtually all of the features available to the free plan.

There is also a paid option which should really only be interesting to businesses/etc which have many users to connect. Alternatively self-host g Headspace has no restrictions at all.