Increase the range of rows included when converting from an excel worksheet to HTML

I would like to convert a xlsx worksheet to HTML format. The worksheet has fewer Worksheet.MaxRows than the specified PageSetup.PrintArea. Therefore when converting to HTML I would like to include empty rows beyond the MaxRows in the HTML output. When changing PageSetup.PrintArea range to be lower than MaxRows (e.g. only print rows 3-15, when the final row in the excel file is 20). But when I try to increase the range (print rows 3-25, when the final row is 20), it only prints up to row 20, instead of including the extra 5 empty rows.

I am using HtmlSaveOptions.ExportPrintAreaOnly to specify the range to print.

Here's a snippet of my code:

FilePath htmlFilePath = output.GetDirPath() + output.GetFileNameWithoutExtension() + ".html";

var htmlSaveOptions = new HtmlSaveOptions
            {
                ExportHiddenWorksheet = false,
                ExportActiveWorksheetOnly = true,
                ExportPrintAreaOnly = true
            };
                
sheet.Workbook.Save(htmlFilePath, htmlSaveOptions);

Another option I could go for is simply inserting the rows manually and removing their styling (though I seem to be having an issue applying styling but that is for another question post), but I was wondering if there is a neater, in-built way this could be done using HtmlSaveOptions.