Export to XLSX files (Microsoft Excel spreadsheets with XML internal structure)

“A file with the .xlsx file extension is a Microsoft Excel Open XML Spreadsheet (XLSX) file created by Microsoft Excel. You can also open this format in other spreadsheet apps, such as Apple Numbers, Google Docs, and OpenOffice. They are stored as a compressed Zip file, which contains a bunch of other files used to open the document.” (c.f. https://www.howtogeek.com/392333/what-is-an-xlsx-file-and-how-do-i-open-one/)

Export[FileNameJoin[{$TemporaryDirectory,DateString["ISODate"]<>"_1.xlsx"}],{{"ElementData",1}}]

SystemOpen[%]