Salesforce Activity tab in Jira
Go to Salesforce Setup -> Edit Page and add the ‘Related Jira Issue Activity’ component.
You can check the checkbox ‘Expand all activities by default’ if you would like to see all activities for all Jira Issues
The ‘Related Jira Issue Activity’ component shows all activities are getting from Jira in real-time.
Clicking by ‘View’ button on Jira Issue you can review all activities related to specific Jira Issue.
After clicking on the ‘View’ button there is an ‘Activity’ tab that contains all Jira history.
The Activity tab can be hidden if it is needed. Go to Lightning App Builder and unenabled Display Activities Tab checkbox.(Available starting from version 1.305.)