OK...  I have complained, gotten schematics and testing procedures, ultimately took it to a dealer.

The SOS connected services is always on the new generation of Toyotas.  If you have the SOS button and, I believe ENTUNE 3 (whatever their "new" system is with Android Auto/Car Play). My particular model is a 2020 4Runner TRD Off-Road and the battery dies every 3 days of non-driving.

Has anyone had success shutting it down ELECTRICALLY.  Not unsubscribing to the service, I'm not subscribed to anything. I want to complete neuter it electrically.  Pull a fuse or whatever it takes to shut this off without screwing up any other features like the entertainment system, the Bluetooth microphone, etc...

I know more than the dealership (proven by their absolute stupidity) and Toyota tech support refused to answer me directly, but supplied vague power circuit schematics.  Since there's an IC circuit/control modules, pulling power is reckless without clearer direction.  Toyota is choosing to be evasive on this.  "Right to repair" stuff, I'm sure... By having this tracking on your car, they can monitor tons of stuff even when you are not subscribed.  This is how their new remote start system works, this is how you can press the button any time and talk to a rep. to subscribe.  It's nuts.