Advertising packets only go out on startup and pairing, not during normal operation.
This may be true for standard BT (I genuinely have not looked into it), but Meta's glasses are pushing out ADV frames every few seconds, paired or not because they act as a BLE beacon.
alt Hacker News
This may be true for standard BT (I genuinely have not looked into it), but Meta's glasses are pushing out ADV frames every few seconds, paired or not because they act as a BLE beacon.