My wife has a WearOS watch and a really useful setting is to mute phone
when wearing the watch and then unmute if you take the watch off or if
it disconnects from the phone. Super useful - I've missed a few phone
calls before because I've wandered to...
I actually already use Sound Assistant (only one setting which is to
open Spotify whenever I press play on bluetooth headphones / car etc.)
but it can't do what I'm requesting here. My phone is always on silent
as I have all notifications vibrate on ...