BLE spam tools rely on a handful of specific payload types, Apple Continuity and proximity pairing, Fast Pair model IDs, Swift Pair. Simulacra specifically does not use any of these so it does not cause pop ups on any devices. It also produces WiFi probe requests not just ble signals.
Simulacra is meant to send out signals that look identical to other real signals making it harder to decipher what's real vs what's not. The unique identifiers of those devices show up and never show again once they churn. They have a fresh set of identifiers each time one is produced. Its never going to be perfect but if you can hide the real stuff in a ton of fake stuff it offers a level of obfuscation that otherwise wouldn't be there.
