Bluetooth Printing To IOS wristband printer

[JoeChap123]

We are trying to print to a ZD510-HC printer direct via bluetooth. - final rep = ZebraSdk.printZPLOverBluetooth(arr, data: data);
when using the mac address from android it works perfectly.
when using the device serial number on IOS nothing happens and no reasonable error message is returned.

any insights would be greatly appreciated!

here is the message returned

flutter: Instance of 'Future'
IAPAppRegisterClient: capabilities 0x8020
IAPAppRegisterClient: __eaClientRegisterediapd 0 -> 1
IAPAppRegisterClient: __eaClientRegisterediap2d 0 -> 1
IAPDHasLaunched: kIAPAvailableNotification iapdAvailableState 100 -> 0
IAPAppRegisterClient: __eaiapdHasClientID 0, IAPDHasLaunched 0
IAP2DHasLaunched: kIAP2AvailableNotification iap2dAvailableState 100 -> 0
IAPAppRegisterClient: __eaiap2dHasClientID 0, IAP2DHasLaunched 0
IAPAppRegisterClient: registerWasSuccessful 0
-[EAAccessoryManager _initFromSingletonCreationMethod] initializing (0x281edcf60) with uuid F4CB595C-E77D-45B7-97A3-236C5666FA7E
-[EAAccessoryManager _initFromSingletonCreationMethod] isRunningOnMac
initialConnectedAccessories count 0
_connectedAccessories (0)
Done attaching initialConnectedAccessories
IAPAppConnectedAccessories: __eaClientHasCheckedForConnectedAccessories 0 -> 1
IAPAppConnectedAccessories: IAPDHasLaunched 0, IAP2DHasLaunched 0
On: 1050 RegisteredForLocalNotifications Count: 1
"onPrintZplDataOverBluetooth: " "61J222400135" " ''\n ^XA\n ^POI\n ^FO50,500^B3R,N,150,Y,N^FD20220123^FS\n ^FO150,1000^ADR,72,40^FD20220123^FS\n ^FO50,1000^ADR,72,40^FDMichael xxxxx^FS\n ^XZ\n "
"Print Queue 1: Get Connected Accesories"
Returning connectedAccessories count 0
"Print Queue 2: Enter Connected Accesories"
"Connection worked" <MfiBtPrinterConnection: 0x282fad5c0>
Returning connectedAccessories count 0
"is Success" -1
"Response" flutter_zebra_sdk.ZebreResult(type: nil, success: Optional(true), message: Optional("Successfully!"), content: Optional(""))