By default, the Permissions Management for Site Admins option includes the option to Grant user(s) permissions directly.
However,ControlPoint Application Administrators can hide this option (if, for example, your organization adheres to the SharePoint best practice of allowing permissions to be granted only via SharePoint groups) by changing the Value of the ControlPoint Configuration Setting Hide the "Set User Direct Permissions" Action in Permissions Management (PREVENTDIRECTPERMS) from false to true.
NOTE: This is an Advanced Setting.