XLUtils v1.13 adds support for converting workbooks to PDF. This is a Windows only feature and it relies on Excel being installed on the computer.
Exporting to PDF is a matter of calling:
Wait For (xl.PowerShellConvertToPdf(WorkbookFile, OutputPDF, SheetIndex, True)) Complete (Success As Boolean)
The attached example is based on the template + chart example: https://www.b4x.com/android/forum/threads/xlutils-templates-and-charts.130373/#content
It creates a workbook and then converts it to a PDF document.