How to display tablelayoutpanel or datagridview in childform in windows forms?

using System;
using System.Drawing;
using System.Windows.Forms;
using FontAwesome.Sharp;
namespace ModernUIApp.Forms
{
    public partial class MainForm : Form
    {
        private IconButton currentBtn;
        private Panel leftBorderBtn;
        private Color currentColor;
        private Form currentChildForm;
        public MainForm()
        {
            InitializeComponent();
            leftBorderBtn = new Panel();
            leftBorderBtn.Size = new Size(7, 40);
            //panel5.Controls.Add(leftBorderBtn);
            //Form
            this.Text = string.Empty;
            this.ControlBox = false;
            this.DoubleBuffered = true;
            this.MaximizedBounds = Screen.FromHandle(this.Handle).WorkingArea;

        }
        
        //Methods
        
        private void OpenChildForm(Form childForm)
        {
            if (currentChildForm != null)
            {
                currentChildForm.Close();
            }
            currentChildForm = childForm;
            childForm.TopLevel = false;
            childForm.FormBorderStyle = FormBorderStyle.None;
            childForm.Dock = DockStyle.Fill;
            // childForm.Font.Size = 10
            pnlDesktop.Controls.Add(childForm);            
            pnlDesktop.Tag = childForm;
            childForm.BringToFront();
            childForm.Show();

        }

        
        private void button1_Click(object sender, EventArgs e)
        {
            //ActivateButton(sender, RGBColors.color2);
            OpenChildForm(new ConferencesForm());
        }
    }
}