Help with Apple bluetooth serial connection to ESP32 module

Hi, We are finishing up a project for a mobile app - (Concept Climbing. It can be found in the google play store) and it connects via bluetooth to an ESP32 device. The android app is finished and the connection via serial is all working. The IOS app is near completion too but we are having difficulty with the IOS - ESP32 bluetooth connection. You will need to be able to write hardware code for the ESP32 to work with Apple whilst not damaging the current android connection abilities. You will work with our current app developer to ensure both android and IOS bluetooth connections work. As part of your application please provide samples which demonstrate your skills AND explanations as to why these samples are relevant to this position.