Hivatalosan igen, de azert elmegy az mason is :) (pl ARM-en)
https://forum.opnsense.org/index.php?topic=12186.195
https://github.com/opnsense/tools#cross-building-for-other-architecures
Sot, a Pfsense-nek (ot forkolta anno az opnsense) meg van is ARM alapu tuzfala: https://www.netgate.com/solutions/pfsense/sg-3100.html