Hi! Getting back now because I’ve built on my free time NS8 for ARM64/ARMv7!
Haven’t tested it so far and pretty much most of the software that is present is not compiled for ARM, so beware of that! (it’s just a matter of trial and error 
, this is a per-module basis)
The repo is available here: GitHub - Tbaile/ns8-core: NethServer 8 Core modules
For the install process you can probably follow the quickstart, but then run
bash install.sh ghcr.io/tbaile/core:main
don’t have any ARM based device sitting unused right now, and I’m not having success in creating an ARM based VM, so best of luck 