> So no one outside of apple is smart enough to get it working.

Pretty much, yeah. And the reason is that Bluetooth is a disaster of complexity. One implementer thinks function X in state Y means "frob", but another interprets that as a "glim" command. Apple makes it work by controlling variables: their controller, their driver stack, their library framework, their app integration. If one team doesn't understand why another team's layer is doing something, they walk across campus and ask them.