Facebook Audience Network Plugin or SDK integration in Ionic 4

I am unable to find Facebook Audience Network Plugin for Ionic 4 and ionic 5. There are Old onces for Ionic 2 and those examples don’t work in latest version

Can we Add Android Audience Network SDK 5.9.0 SDK in my Ionic Project.
Is there a way to add external SDK in your ionic Project

Thanks in advance

We also are trying to upgrade our Audience Network SDK to 5.9 but getting this error at runtime:

E/AndroidRuntime: FATAL EXCEPTION: main

java.lang.RuntimeException: Unable to resume activity 

{xxxxxxxxxxx/xxxxxxxxxxxxxxx.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method ‘android.content.Context
android.content.Context.getApplicationContext()’ on a null object reference
at android.app.ActivityThread.performResumeActivity