I’m having a terrible time trying to disconnect my wireless noise cancelling speakers from google assistant.

There’s a switch on the headphones to toggle Ambient/Noise-Canceling mode.
BUT you can disable that and instead use google assistant.
Which my son did while he was home.
Now he’s 5 states away.
And when I try to use my toggle, it declares, “google assistant is not connected”

Aack. Can’t find any instructions to turn this off that don’t include “open your mobile device”... yah, that’s in Georgia.

Anyone know anything about Sony noise cancelling headphones?