Hello,
In order to allow them to upload documents, you need to give them ‘propose’ access for their direct reports for each of the document categories.
In order to give them the rights to use templates, this would be the ‘edit’ access rights. However, I do not recommend this as you cannot choose individual templates to give them access to, it is all or nothing. So if you have other templates ie salary uplift, change in working hours ect, the supervisors would be able to create those.
If you have any questions, let me know.
Thanks!