As far as I recall it took forever to get sanctioned.

System Bridge might just be what you’re looking for.

Take a look at the Prusa Mini and Bambu Lab A1 Mini. It sounds like you want something reliable so I’d stay away from the ultra cheap stuff.

Home Assistant OS won’t support this board immediately, though I’d expect a beta to arrive sooner rather than later.

USB-C iPhone? You’re right, it is working.