use OptimistDigital\NovaTableField\Table;

public function fields(Request $request)
{
    return [
        Table::make('Countries')

        // Optional:
        ->disableAdding() // Disable adding new rows and columns
        ->disableDeleting() // Disable deleting rows and columns
        ->minRows(1) // The minimum number of rows in the table
        ->maxRows(10) // The maximum number of rows in the table
        ->minColumns(1) // The minimum number of columns in the table
        ->maxColumns(10) // The maximum number of columns in the table
    ];
}