I’m not an audiophile, but after hearing Sonos at a friend’s house and being impressed, I decided to purchase a speaker for my kitchen, where I often listen to music while cooking. I opted for the Sonos Five, assuming that Bluetooth connectivity would be a standard feature on a standalone speaker, especially at this price point. To my surprise, a speaker costing nearly $600 doesn’t support Bluetooth—it only works via…
Unfortunately that's due to Google's bullshit. There's a lack of appropri APIs, that's why you'll notice that any "smart" audio device (by smart I mean, integrates directly with music streaming services/locally stored music) doesn't support YouTube nor YouTube Music.
Music Assistant (sister project to Home Assistant) supports it via hacks such as pretending to be a TV or copy pasting auth cookies.
It's frankly an embarrassment from Google not to have APIs for this, they only lose potential users.