RecyclerView Only Displays First Instance from Zxing Barcode Scan and Updates Itself Instead of Adding New Items

So I am trying to scan multiple QR barcodes one by one and add them into the recyclerview list. I can scan one barcode, but upon the next scan the previous data gets overwritten by the new data, instead of adding it to the list. If I implement a list programmatically it populates the list fine so it's not a layout issue. It was suggested that I may have an issue where I may have put findViewById on a "view" inside recyclerview which could be the reason it only shows one instance of the data.

class QRAdapter (private var list: List<QRModel>) : RecyclerView.Adapter<QRAdapter.ViewHolder>() 

class ViewHolder(view: View) : RecyclerView.ViewHolder(view) {
    val qrTagID: TextView = view.findViewById(R.id.qrTagID)
}

override fun onCreateViewHolder(viewGroup: ViewGroup, viewType: Int): ViewHolder {
    // Create a new view, which defines the UI of the list item
    val view = LayoutInflater.from(viewGroup.context)
        .inflate(R.layout.recyclerview_rfid, viewGroup, false)

    return ViewHolder(view)
}

override fun onBindViewHolder(viewHolder: ViewHolder, position: Int) {

    val newList = list[position]

    viewHolder.qrTagID.text = newList.qrTagID
}

override fun getItemCount() = list.size

}

data class QRModel(val qrTagID: String)`

class QRData : AppCompatActivity(){

private lateinit var recyclerView: RecyclerView
private lateinit var list : ArrayList<QRModel>
private var qrAdapter: QRAdapter? = null
private var qrTagCount : TextView? = null
private lateinit var qrTagHeader : TextView
private lateinit var qrScanRoom: ImageView
//private var qrTagId: TextView? = null
private var gridLayoutManager: GridLayoutManager? = null


@SuppressLint("SetTextI18n", "NotifyDataSetChanged")
override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_qr_data)


    // Resources
    qrTagCount = findViewById(R.id.qrTagCount)
    qrTagHeader = findViewById(R.id.qrTagHeader)
    recyclerView = findViewById(R.id.qrRecyclerView)
    qrScanRoom = findViewById(R.id.scan_qr_room_white)
    //qrTagId = findViewById(R.id.qrTagID)


    // QR Scan Room Location onClick listener
    qrScanRoom.setOnClickListener {
        val intentIntegrator = IntentIntegrator(this)
        intentIntegrator.setBeepEnabled(false)
        intentIntegrator.setOrientationLocked(false)
        intentIntegrator.setCameraId(0)
        intentIntegrator.setPrompt("SCAN")
        intentIntegrator.setBarcodeImageEnabled(true)
        intentIntegrator.initiateScan()
    }

    //RecyclerView Data
    
    recyclerView.isNestedScrollingEnabled = false
    recyclerView.setHasFixedSize(true)

    recyclerView.addItemDecoration(DividerItemDecoration(this, GridLayoutManager.VERTICAL))
    
    qrList()

    recyclerView.layoutManager = GridLayoutManager(this, 3)
    gridLayoutManager?.reverseLayout = false
    gridLayoutManager?.stackFromEnd = true
}

@SuppressLint("NotifyDataSetChanged")
@Deprecated("Deprecated in Java")
override fun onActivityResult(
    requestCode: Int,
    resultCode: Int,
    data: Intent?
) {
    val result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data)
    if (result != null) {
        if (result.contents == null) {
            Toast.makeText(this, "Cancelled", Toast.LENGTH_SHORT).show()
        } else {
            Log.d("QRData", "Scanned")
            Toast.makeText(this, "Scan Successful!", Toast.LENGTH_SHORT)
                .show()
            val codeContent = result.contents
            // Get only cage ID# from url
            val code = codeContent.filter(Char::isDigit)
            qrTagID?.text = String.format(code)
        }
    } else {
        super.onActivityResult(requestCode, resultCode, data)
    }
}



@SuppressLint("NotifyDataSetChanged")
private fun qrList() {
val list = ArrayList<QRModel>()
    list.add(QRModel(""))
    qrAdapter?.notifyDataSetChanged()     
    qrAdapter = QRAdapter(list)
    recyclerView.adapter = qrAdapter
}