During my research on Atom S3U capabilities using CircuitPython, I've stumbled upon _bleio low-level Bluetooth Low Energy module. Using my two other implementations, one from Bleach, second from Jammy, that were both based on Sour Apple Attack, I was able to broadcast Samsung watch devices BLE Advertisements, which consecutively displayed pop-ups on Samsung device with an Add New Device request.
This script does not use any Pin references, which means - If you have built-in BLE module, feel free to test this out.
CircuitPython version: 9.0.5
External libraries: None
License: MIT
Hardware used: Atom S3U
Chip: ESP32S3