This has been a feature that has been requested for as long as I can remember using Microsoft Dynamics CRM and the Power Platform, and finally it is here.
The ability to restrict access to particular views by setting security roles (similar to what is available in forms), is now available from the Maker Portal. In order to access this feature, all that needs to be done is navigate to a view where you restricted only for a subset of users, and click on the More options (three vertical dots) image, and select the View settings options as shown in the image below
Once you click on the View settings, similarly to what is available in the Form settings to allow restricted forms for only particular security roles, you will get a popup up window where you can select whether the view should be available for everyone or if you want to restrict it select the Specific security roles options, and then select which roles you want to allow this view enabled for. When you select the Specific security roles, the System Administrator and System Customizer roles are given access by default.
