I searched a lot and i didnt find any extension to feet my needs.
I want the administrator to be able to download list of products from the backend only
A few that come into my mind are:
https://forum.virtuemart.net/index.php?topic=116584.msg459429#msg459429
https://extensions.joomla.org/extensions/extension/hosting-a-servers/database-management/phpmyjoomla/
https://extensions.joomla.org/extension/product-excel-like-manager-for-virtuemart/
https://extensions.joomla.org/extension/csvi-pro/
https://extensions.joomla.org/extension/vm-products-csv/
https://extensions.virtuemart.net/back-office/import-export
...
jjk, you forgot my tool to export CSV, print or preview list with many filters and thumb image if needed.
https://shop.st42.fr/en/products/vm-be-pro-batch-product-edit.htm