Or install directly on your Confluence Cloud instance:
On your Confluence Cloud instance navigate to the homepage by clicking on the Confluence Logo.
Then click the cog icon to navigate to the Confluence settings admin page.
Scroll down to find the section Atlassian Marketplace and click on Find new apps. On the marketplace, search bar look for Custom Jira Charts for Confluence. Image Added
This is the direct link for the marketplace: (Change <YOUR_CONFLUENCE_URL> to your Confluence URL)