Doesn't https://caniuse.com already fill this need? This article is just evangelism, if you want technical sources the community has had you covered for a long time.
Sure you can look things up but it would be nice to look at this evangelism site and tell at a glance that Bluetooth isn’t supported everywhere the way playing a sound is.
To clarify what you're actually trying to say: Access to the low level Bluetooth device API is not as pervasively supported as audio output is. Quite clearly you can play audio to a bluetooth device in a PWA everywhere.
And that kind of ambiguity is why you need to be using a rigorous source like caniuse and not just looking at summary statements for this kind of information.
Right. Audio over BT just counts as audio, the BT permission means something mote like connect to and use arbitrary BT devices.
I didn’t actually mean to compare BT vs BT audio in my original post, I just picked an example every browser will let you do. I hadn’t considered the crossover until I saw your reply.