The app requires an active “SharePoint Connector for Jira” license on the Jira Cloud instance that you want to connect to SharePoint.
The license can be bought through the Atlassian Marketplace.
This allows you to use the same Jira Cloud instance on multiple SharePoint Online tenants at the same time.
Installing the Jira WebPart in SharePoint is very simple and straightforward as the solution is directly available in Microsoft AppSource.
To install the app simply open the product offer in Microsoft AppSource and click on “Get it now“.
You want to start using the Jira webpart? See how here!