I believe that it only applies to BT Classic, and that WiFi and BTLE are not required to have this security processor.
I have only done stuff for Android, but looking into iOS - just in case we needed to break into the Apple domain (thankfully not) - it seems LE is OK without the secondary processor.
The only thing I didn't conclude on, if it makes a difference to you, is their MAC hopping in discovery, i.e. the MAC address changes whilst in discovery mode to stop tracking, I am not 100% sure what peripherals this applies to, but is present on the newer iOSes.