esp32 interface with IoS swift code help

Hi, I am facing an issue while connecting esp32 with IoS app(esp32 code is ok just issue is with IoS swift code). my Ios App is working with nrf52 ble peripheral example but when i connect it with esp32 it doesn't send data. on phone screen it shows no characteristics found. I have swift code working with nrf52 just help me in its setting with esp32. or if you have worked with esp32 interface then set rx characteristics accordingly.