Why does the pdf file display on the computer but not on the mobile phone?

PHPMaker General Discussion (PHPMaker)
1

Why does the pdf file display on the computer… but not on the mobile phone?
The computer displays the content of the PDF file
The mobile phone displays only the file name
Is there a solution?

ew.PDFObjectOptions = {
      width: "600px",
      height: "600px",
      pdfOpenParams: {
        toolbar: 1
      }
};

I use PHPMaker v2024.4.0 Released