IOS Using to CallKeep Unable to make a outgoing GSM call during VOIP call (App to App)

Bug report

I am trying to make GSM (Cell, Native call) during VOIP Call running VOIP Call (App to App)

• Reproduced on:
• iOS

Description

When I hit call outgoing APP to APP getting event
RNCallKeep.addEventListener('didReceiveStartCallAction', ({ handle, callUUID, name }) => {

});

But I need to the same event called When Hit GSM (Cell, Native call) during VOIP Call running VOIP Call (App to App) but not getting Any event call

or

Please give any Solution for This

Steps to Reproduce

-> One to One App to APP call Running
-> Call Working fine Audio is also working
-> Then I am going to make calls GSM call during the app to app call running
-> Native Dail pad open
-> Enter mobile Number
-> Press Dail Button From native Dailer but Button is not Clickable

Versions

- Callkeep:   "react-native-callkeep": "4.3.1",
- React Native:  0.62.3
- iOS: 15.3.1
- Android: working fine 
- Phone model: All iPhones

Reproduce the sequence on iOS 15.3.1 with react-native-callkeep 4.3.1 and React Native 0.62.3, using the listed app-to-app and GSM call steps. Start at the RNCallKeep.addEventListener('didReceiveStartCallAction') entry point and trace the native iOS call flow. Done means the missing GSM behavior is explained and a verified project-level fix or limitation is established.