Just got a Sonos e-mail offering me extended warranties on some of my existing Sonos devices, Arc, One SL but not on older ones Beam G1, Play 1 - 3 or 5 G2, or Sub G2.
Check here: System | Sonos
https://www.sonos.com/en-us/myaccount/system/households/devices
So what products do you have that are eligible?
My list:
Arc
One SL