I know how it is. Used to work on phone chipsets. That being said, I have no idea how pixel 8 is doing this, but likely the Bluetooth chipset has a mode it can go into to behave like AirTags and just pulse out a BTLE beacon occasionally with both the main OS and sub-OSes turned off and power just being trickled to VCC on the BT chip.
Edit: apologies, didn’t mean to sound so curt. Tl;dr: I know how bootloaders run to allow battery charge while off, not sure how pixel 8 is doing their magic-to-be but have a good theory.
I know how it is. Used to work on phone chipsets. That being said, I have no idea how pixel 8 is doing this, but likely the Bluetooth chipset has a mode it can go into to behave like AirTags and just pulse out a BTLE beacon occasionally with both the main OS and sub-OSes turned off and power just being trickled to VCC on the BT chip.
Edit: apologies, didn’t mean to sound so curt. Tl;dr: I know how bootloaders run to allow battery charge while off, not sure how pixel 8 is doing their magic-to-be but have a good theory.