code: public function allDrawings(Spreadsheet $spreadsheet)
      {
          // Get an array of all drawings
          $aDrawings = [];
  
          // Loop through PhpSpreadsheet
          $sheetCount = $spreadsheet->getSheetCount();
          for ($i = 0; $i < $sheetCount; ++$i) {
              // Loop through images and add to array
              $iterator = $spreadsheet->getSheet($i)->getDrawingCollection()->getIterator();
              while ($iterator->valid()) {
                  $aDrawings[] = $iterator->current();
  
                  $iterator->next();
              }
          }
  
          return $aDrawings;
      }
docs: Get an array of all drawings.
  
  @param Spreadsheet $spreadsheet
  
  @return \PhpOffice\PhpSpreadsheet\Worksheet\Drawing[] All drawings in PhpSpreadsheet