Extra Fields for Jira Service Management
Information available to your customer in Jira Service Management portal is too limited? Do you want to show request priority, assignee, time estimate and many other fields to JSM customers? You can solve this problem with Extra Fields for Jira Service Management
This add-on was initially released as Read Only Fields for Jira Service Desk.
Install
If you haven't installed, please install from Atlassian Marketplace here: https://marketplace.atlassian.com/apps/1222530
User Guide
Once installed, you can go to Service Desk project setting. On the left sidebar, find tab: Portal Extra Fields

Extra Fields for JSM configuration
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 the portal.
Save the selected fields. Now you can create a test request or use an existing request. Make sure to assign values to selected fields via issue edit screen if they are empty.
Portal View

Those read only fields with values will be displayed in portal request detail view.
If you faced any issue, checkout the following page for possible workaround: