Giving an app permissions to my documents folder without admin
You will not be able to make the change from the command line if you can’t make it from the GUI.

https://support.apple.com/guide/mac-help/control-access-files-folders-mac-mchld5a35146/mac

Look in settings for Profiles - if you see them, the people managing settings will need to grant your app permissions or let you become an admin or make the allowance for you.