There do exist programs that can decrypt and extract the content of a Whatsapp Crypt archive as HTML document via the CRYPT to HTML conversion. After that, you can use the HTML and import it in a spreadsheet program with Excel formats support which you can do with any of the programs listed under HTML to XLSX converters.
Convert WhatsApp encrypted backup (original) to Microsoft Excel Open XML workbook and spreadsheet.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert crypt to xlsx on Windows
Andriller is software utility with a collection of forensic tools for smartphones. It performs read-only, forensically sound, non-destructive acquisition from Android devices.
Convert from crypt file
to xlsx file
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.