Wix has different levels of contributor roles: Inviting Site Contributors
In order for a contributor to be able to access the settings of any of your POWR apps, they will need "Editor" access to your site. Currently, this is the case for the Owner, Admin, and Website Manager role.
A contributor with access to the app settings will have their own POWR account created. That POWR account has access to all POWR apps on your site.
They can also access the Response Dashboard or the Sales Dashboard for any POWR forms or payment apps that are installed on your website.
Form Response Dashboard
A contributor will not be able to access the Form Response Dashboard through the Wix dashboard directly. They can only look up submissions if they also have access to the site itself and access the Response Dashboard from within the app settings.
Grant access through POWR
If you need to give access to form data to a user who does not have access to your Wix website, you can grant access to individual POWR apps through POWR directly.