The package doesn't come with any screens out of the box, you should build that yourself. Here are some options to get you started:
If you'd like to build your own UI, and understand the underlying logic for Gates and Roles and Users, the Laravel 6 User Login and Management With Roles video series by Mark Twigg of Penguin Digital gives thorough coverage to the topic, the theory, and implementation of a basic Roles system, independent of this Permissions Package.