IBEACON not working

[Makuo12]

I tried setting up a ibeacon but it is not working properly

const IBEACON_PREFIX: [u8; 2] = [0x02, 0x15]; // iBeacon prefix // Apple's prefix
const BEACON_UUID: &str = "87b99d1c-4828-4b91-bed5-9054731a2356";
const MAJOR: [u8; 2] = [0x00, 0x01]; // Major value 1
const MINOR: [u8; 2] = [0x00, 0x01]; // Minor value 1
const TX_POWER: i8 = -59; // Calibrated Tx power at 1 meter

fn create_ibeacon_data() -> Vec<u8, 31> {
    let beacon_uuid = uuid::Uuid::parse_str(BEACON_UUID).expect("uuid_failed");
    let mut data: Vec<u8, 31> = Vec::new();
    data.extend_from_slice(&[0x02, 0x15]); // iBeacon prefix
    data.extend_from_slice(beacon_uuid.as_bytes());
    data.extend_from_slice(&MAJOR);
    data.extend_from_slice(&MINOR);
    data.push(TX_POWER as u8);
    
    data
}

async fn advertise<'a, C: Controller>(
    name: &'a str,
    peripheral: &mut Peripheral<'a, C>,
) -> Result<Connection<'a>, BleHostError<C::Error>> {
    let ibeacon_structure = create_ibeacon_data(); // Ensure this returns AdStructure::ManufacturerData

    let mut advertiser_data = [0; 31];
    AdStructure::encode_slice(
        &[
            AdStructure::Flags(LE_GENERAL_DISCOVERABLE | BR_EDR_NOT_SUPPORTED),
            AdStructure::ManufacturerSpecificData { company_identifier: 0x004C, payload: &ibeacon_structure },
        ],
        &mut advertiser_data[..],
    )?;

    // let mut scan_data_buffer = [0; 31];
    // AdStructure::encode_slice(
    //     &[
    //         AdStructure::ServiceUuids16(&[Uuid::Uuid16([0x3b, 0x18])]),
    //         AdStructure::CompleteLocalName(name.as_bytes()),
    //     ],
    //     &mut scan_data_buffer[..],
    // )?;

    let advertiser = peripheral
        .advertise(
            &Default::default(),
            Advertisement::ConnectableScannableUndirected {
                adv_data: &advertiser_data[..],
                scan_data: &[],
            },
        )
        .await?;
    info!("[adv]  advertising");
    let conn = advertiser.accept().await.unwrap();
    info!("[adv] connection established");
    Ok(conn)
}

When I also try to included scan_data_buffer into scan_data: &scan_data_buffer,I get an error. I am trying to use the esp32 as an Ibeacon, but I still want to be able to transmit data between the IOS device and the esp32