When I say “hey google” on my Sonos Arc, it is not aware of the timers I set on other Google Home/Home Mini devices (even though the Google devices themselves are aware of timers you set on others). 
 

There isn’t an issue with linking accounts. I am surprised. 

I also noticed commands like “hey Google turn off the TV” which normally works on a Google Home Mini responds with an error on Sonos (oddly enough I can do most other things via Sonos Google Assistant like turning lights on/off).