Allowing Visitors to Upload Multiple Documents at Once Using the Upload Button

This feature has been released. Check out the support article at https://support.wix.com/en/article/content-manager-uploading-multiple-documents-with-the-upload-button

Currently, the upload button only allows your site visitors to upload one
document file at a time. However, you can add multiple upload buttons to your
site and connect them to the relevant fields in your collection to achieve a
similar effect.

We are always working to update and improve our products and your feedback is
greatly appreciated.

If this is a feature you would like to see in the future, please click **Vote
for this feature** and we'll make sure to keep you updated