...
Existing recipients cannot be edited. Only new ones can be added with the function: Add a recipient to a package. The attached files also cannot be edited. If they needed to be changed, the failed package may be deleted and a new one created.
If the administrator allowed this, the sender and optional contributors can also add, delete and move files and folders in the package. But this is done in the https://wikisonpo.atlassian.net/wiki/spaces/SPEN/pages/903087423/Package+detail.