If you signed up before Aug 9, 2021, please click Previous plans to view your applicable plans.
The scope of an agent can be based on the groups in the portal. Please navigate to Admin -> Team -> Agents -> click on edit to associate groups within the profile.
This group could be routed to a product under Admin -> Support Operations -> Multiple Products -> Edit the product -> Assign to Group and agents who specifically need to access this product could be added to that Group under Admin -> Team -> Groups. They are the ones with group access on the portal. This would restrict them to a particular product portal.