Check the report on Dashboard
Open the report you want to forward to Jira and expand the Integrations chapter in its bottom right corner:
There, you can see a direct link to the report's accompanying Jira issue. If you don't see the Integrations chapter though, that means your app isn't correctly integrated with Jira in the first place.
Is your app connected to a correct Jira project?
Visit Settings › Apps and open up your app. If the bug forwarding is successfully set up, it will look like this:
Click Edit to see to which Jira project the are reports being forwarded to. If everything is set up correctly, all reports will be forwarded to your Jira project either:
or you can choose to forward only some reports to Jira, by hand.