How to load SfDataGrid dynamically with JSON data without POCO classes ?

public class ViewModel
{
        public const string JsonData = "[{\"OrderID\":1,\"EmployeeID\":100,\"FirstName\":'Gina',\"LastName\":'Gable'}," +
                                       "{\"OrderID\":2,\"EmployeeID\":200,\"FirstName\":'Danielle',\"LastName\":'Rooney'}," +
                                      "{\"OrderID\":3,\"EmployeeID\":300,\"FirstName\":'Frank',\"LastName\":'Gable'},]" ;
                                      
       public ObservableCollection<DynamicModel> DynamicCollection { get; set; }
       public List<Dictionary<string, object>> DynamicJsonCollection { get; set; }
 
        public ViewModel()
        {
            DynamicJsonCollection = JsonConvert.DeserializeObject<List<Dictionary<string, object>>>(JsonData);
            DynamicCollection = PopulateData();
        }
 
        private ObservableCollection<DynamicModel> PopulateData()
        {
            var data = new ObservableCollection<DynamicModel>();
            foreach (var item in DynamicJsonCollection)
            {
                var obj = new DynamicModel() { Values = item };
                data.Add(obj);
            }
            return data;
        }
}

public class DynamicModel : INotifyPropertyChanged
{
        public Dictionary<string, object> data;
 
        public event PropertyChangedEventHandler PropertyChanged;
 
        public Dictionary<string, object> Values
        {
            get
            {
                return data;
            }
            set
            {
                data = value;
                if (PropertyChanged != null)
                    PropertyChanged(this, new PropertyChangedEventArgs("Values"));
            }
 
        }
        public DynamicModel()
        {
            this. data = new Dictionary<string, object>();
 
        }
}

public partial class MainPage : ContentPage
{
        private SfDataGrid grid;
        private ViewModel viewModel;
        public MainPage()
        {
            InitializeComponent();
            grid = new SfDataGrid();
            viewModel = new ViewModel();
            grid.AllowSorting = true;
            grid.AutoGenerateColumns = false;
            grid.ColumnSizer = ColumnSizer.Star;
            grid.ItemsSource = viewModel.DynamicCollection;
            grid.Columns.Add(new GridTextColumn()
            {
                HeaderText = "Order ID",
                MappingName = "Values[OrderID]",
                LineBreakMode = LineBreakMode.WordWrap,
                TextAlignment = TextAlignment.Center,
                HeaderTextAlignment = TextAlignment.Center,
            });
 
            grid.Columns.Add(new GridTextColumn()
            {
                HeaderText = "Customer ID",
                MappingName = "Values[EmployeeID]",
                LineBreakMode = LineBreakMode.WordWrap,
                TextAlignment = TextAlignment.Center,
                HeaderTextAlignment = TextAlignment.Center,
            });
 
        this.Content = grid;
 
        }
}

public class QueryableViewExt : GridQueryableCollectionViewWrapper
{
        public QueryableViewExt(IEnumerable source, SfDataGrid grid) : base(source, grid)
        {
 
        }
 
        public override Expression<Func<string, object, object>> GetExpressionFunc(string propertyName, DataOperation operation = DataOperation.Default, DataReflectionMode reflectionMode = DataReflectionMode.Default)
        {
            Expression<Func<string, object, object>> exp = base.GetExpressionFunc(propertyName, operation, reflectionMode);
            if (exp == null)
            {
                Func<string, object, object> func;
                func = (propertyname, record) =>
                {
                    var provider = this.GetPropertyAccessProvider();
                    return provider.GetValue(record, propertyName);
                };
                exp = (propertyname, record) => func(propertyName, record);
            }
            return exp;
        }
    }

// grid.ItemsSource = viewModel.DynamicCollection;
grid.ItemsSource = new QueryableViewExt(viewModel.DynamicCollection, grid);