var ThisPdfDoc := iexPdfiumCore.TPdfDocument.Create;
try
  ThisPdfDoc.LoadFromFile(APdfFile);
  for var i := 0 to ThisPdfDoc.PageCount - 1 do
  begin
    //ThisPdfDoc.Pages[i]. -> Unfortunately, there is no method to extract the text from the whole page!
  end;
finally
  ThisPdfDoc.Free;
end;