code: public function getStyleByColumnAndRow($columnIndex1, $row1, $columnIndex2 = null, $row2 = null)
      {
          if ($columnIndex2 !== null && $row2 !== null) {
              $cellRange = Coordinate::stringFromColumnIndex($columnIndex1) . $row1 . ':' . Coordinate::stringFromColumnIndex($columnIndex2) . $row2;
  
              return $this->getStyle($cellRange);
          }
  
          return $this->getStyle(Coordinate::stringFromColumnIndex($columnIndex1) . $row1);
      }
docs: Get style for cell by using numeric cell coordinates.
  
  @param int $columnIndex1 Numeric column coordinate of the cell
  @param int $row1 Numeric row coordinate of the cell
  @param null|int $columnIndex2 Numeric column coordinate of the range cell
  @param null|int $row2 Numeric row coordinate of the range cell
  
  @return Style