In Android, I am not able to find few symbols inside my .so file?

Question

I generate a .so file during my build and add it in the right place inside 'jnilibs' folder but I am facing an error stating "Cannot find the native function implementation with Unsatisfied Link Error"

// This is my .kt file

import abc.def.xyz

class MainActivity : Activity () {

public external fun MyNativeFunction() : Boolean

    override
    fun onCreate (pSavedInstance : Bundle?) 
    {
        super.onCreate (pSavedInstance)
    
        // Calling my Native function
    
        val check = MyNativeFunction ()
    }
}


// This is my .cpp file

extern "C" JNIEXPORT jboolean JNICALL
Java_abc_def_xyz_MainActivity_MyNativeFunction () noexcept

{

     // .... some code written here

    return true;
}

It's not able to find the function's implementation 'MyNativefunction'. Even the signature is correct but couldn't find where I am going wrong.

When I tried to extract the symbols from my generated .so file I was not able to see the this function inside the .so file. Can somebody tell me where I am going wrong?

Help would be appreciated.