Information available to your customer in Service Desk portal is too limited? Do you want to show request priority, assignee, time estimate and many other fields to customers? You can solve this probem with Extra Fields for Jira Service Desk
If you haven't installed, please install from Atlassian Marketplace here: https://marketplace.atlassian.com/apps/1222530
Once installed, you can go to Service Desk project setting. On the left sidebar, find tab: Portal Read Only Extra Fields
Here you can choose fields which you want to let customers view. Please note that fields selected here needs to have value. If any of the fields does not yet contain value, it will not be displayed in portal.