By default Jira Issue Preview in Slack only shows the following fields

• Status
• Assignee
• Priority
  

At the moment it is only possible to customize the notifications that are posted in Slack as per Using Jira applications with Slack - How do I set up Slack post function notifications?. However, we cannot modify or change the Issue Preview when the notification is posted, OR when Issue Preview is triggered by mentioning the issue key.

Suggestions

It would be useful if users can modify the Issue Preview such as adding the fields.