This happens to be a nothingburger. These are undocumented HCI commands in the BLE api. Which means that you can do some previously undocumented stuff with the ESP32 if you already have access to run your own code on it to begin.

That said, any chip with ROM code or "binary blobs" that are needed runtime to interact with the hardware are problematic. For a microcontroller this is not as common yet, but unfortunately more complex SoCs that can run Linux almost always have some sort of secret binary blob nowadays.