public class Column<T>
{
    public string Header;
    public Func<T, string> GetValue;
    public int Width;

    public Column(string header, Func<T, string> getValue, int width = 1)
    {
        Header = header;
        GetValue = getValue;
        Width = width;
    }
}

public class Cell : MonoBehaviour
{
    [SerializeField] private Text _text;
    [SerializeField] private LayoutElement _layoutElement;

    public string Text { set => _text.text = value; }
    public int Width { set => _layoutElement.flexibleWidth = value; }

    private void Start()
    {
        _layoutElement.preferredWidth = 0;
    }
}

public class Row<T> : MonoBehaviour where T : struct
{
    [SerializeField] private Cell cellPrefab;

    private List<Cell> _cells = new List<Cell>();
    private List<Column<T>> _columns = new List<Column<T>>();

    public List<Column<T>> Columns
    {
        set
        {
            _columns = value;

            RemoveCells();
            CreateCells();
        }
    }

    public void UpdateCells(T? data = null)
    {
        for (int i = 0; i < _columns.Count; i++)
        {
            _cells[i].Text = data == null ? _columns[i].Header : _columns[i].GetValue((T)data);
        }
    }

    private void RemoveCells()
    {
        foreach (GameObject cell in transform)
        {
            Destroy(cell);
        }
        _cells.Clear();
    }

    private void CreateCells()
    {
        foreach (Column<T> column in _columns)
        {
            var cell = Instantiate(cellPrefab, transform);
            cell.Width = column.Width;
            _cells.Add(cell);
        }
    }
}

// Пример использования
// Описание колонок
private readonly List<Column<ProductMarketData>> _columns = new List<Column<ProductMarketData>>()
{
    new Column<ProductMarketData>("product", data => data.name, 2),
    new Column<ProductMarketData>("price", data => data.price.ToString("0.00"), 2),
    new Column<ProductMarketData>("sellDemand", data => data.sellDemand.ToString("0.00")),
};

// Создание строки
var row = Instantiate(rowPrefab, tableContent.transform);

row.Columns = _columns;

// Обновление строки
row.UpdateCells(data);