Take a look at netbird or tailscale

I drive Arch btw™

For sure. It’s basically a NAS software appliance. You just need to bring your own x86 hardware. Truenas core was good, but they will stop actively developing soon in favor for scale.

I have it running both hardware (backup) as well as virtualized (with a special sas/sata card as PCI pass thru). Works like a charm.

Not to mention the sheer amount of security vulnerabilities they constantly have in their products. I never recommend QNAP for that reason. Out of the box solutions I only recommend Synology. Selfbuild route is uraid and my personal fav. Truenas scale.