On a 2021 Camry there is an below-dash fuse labeled "DCM" which you can remove (and it does disable OnStar/telemetry, but not sat.radio[0]) — it also disables one of the speakers (used for phone calls), which there is a bypass to resolve (but it still requires removing infotainment, so at that point just unplug it there.?!).
[0] It was my understanding that, like GPS-receivers, Sirius/XM was one-way streaming, only..?
[0] It was my understanding that, like GPS-receivers, Sirius/XM was one-way streaming, only..?