Earlier quoted context omitted.
It'd be great if open firmware could be commercially viable. Finding a business model is hard. The OpenWRT One [1] sponsored by the Software Conservancy [2] and manufactured by Banana Pi [3] works lovely. [1] https://openwrt.org/toh/openwrt/one [2] https://sfconservancy.org/activities/openwrt-one.html [3] https://docs.banana-pi.org/en/OpenWRT-One/BananaPi_OpenWRT-O...
Open to audits doesn't mean free software, it just means visible source. The business model for selling routers with auditable firmware is selling routers.
Even if this wasn't done, at the very least they must publish their software testing procedures, the way UL, ETL, and CSA require to certify devices for the US power grid. (https://www.komaspec.com/about-us/blog/ul-etl-csa-certificat...) They can also do black box testing.
But ideally they would actually inspect the software to ensure its design is correct. Otherwise vibe-coded apps with swiss cheese code will be running critical infrastructure and nobody will know until it's too late.