NotificationWithReceiverIntent.kt

val broadcastIntent = Intent(context.applicationContext, NotificationReceiver::class.java)
val actionIntent = PendingIntent.getBroadcast(
    context.applicationContext,
    0, broadcastIntent, PendingIntent.FLAG_UPDATE_CURRENT or
    // mutability flag required when targeting Android12 or higher 
    PendingIntent.FLAG_IMMUTABLE
)

// notification code 
val notification = NotificationCompat.Builder(context, NOTIFICATION_CHANNEL_ID)
        .setSmallIcon(R.mipmap.ic_launcher)
        .setContentTitle("Android12")
        .setContentText("Notification trampoline restrictions")
        .addAction(R.mipmap.ic_launcher, "Open activity from receiver", actionIntent)
        .setAutoCancel(true)
        .build()

notificationManager.notify(getUniqueId(), notification)