Retrieve connected peripherals returns empty array

Question

I have an Android phone connected to an iPhone via bluetooth. Using CBCentralManager I tried to retrieve all connected peripherals as such:

let data = centralManager.retrievePeripherals(withIdentifiers: [])        
let data1 = centralManager.retrieveConnectedPeripherals(withServices: [])

I passes an empty array because I thought it would return me everything, but instead I get an empty array in both cases.

According to this post, it's probably because the connection is not BLE but Bluetooth classic.

How can I still retrieve the Android BT connection?

Edit:

I also tried to add an array of services:

let data1 = centralManager.retrieveConnectedPeripherals(withServices: [CBUUID(string: "0xFD6C"), CBUUID(string: "0xFD69"), CBUUID(string: "0xFD5A"), CBUUID(string: "0xFD59"), CBUUID(string: "0xFD4B"), CBUUID(string: "0xFDDB"), CBUUID(string: "0xFD7E")])

The numbers are taken from here for a Samsung devices. Still I got an empty array.