How to implement implicit intent to open another app from my app in kotlin?

Question

Not able to find any source where it is clear about adding implicit intent to open another app from my app in kotlin.

Manifest.xml

<intent-filter>
                <category android:name="android.intent.category.LAUNCHER" />
                <action android:name="android.intent.action.MAIN" />
                <action android:name="android.intent.action.VIEW"/>
                <category android:name="android.intent.category.DEFAULT" />
</intent-filter>

MainActivity.kt

val location = Uri.parse("com.whatsapp")
            val mapIntent = Intent(Intent.ACTION_VIEW, location)

            try {
                startActivity(mapIntent)
            } catch (e: ActivityNotFoundException) {
                intent = Intent(Intent.ACTION_VIEW)
                intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
                intent.setData(Uri.parse( "market://details?id=" +"com.whatsapp"))
                startActivity(intent)
            }

            val i = packageManager.getLaunchIntentForPackage("com.whatsapp")
            i?.putExtra("data", "This is from first app")
            if(i !=null){
                startActivity(i)
            }
            else{
                intent = Intent(Intent.ACTION_VIEW)
                intent.setData(Uri.parse("market://details?id=" +"com.whatsapp"))
                    startActivity(intent)
            }

It opens WhatsApp directly in playstore instead of opening the app.