Confluence plugin for Xray gadgets : External Gadgets for Confluence

From Confluence 9.0 and later, external gadgets are no longer directly available and require installing a separate "External Gadgets for Marketplace" app on Confluence. 

We need to test the app and confirm its full functionality. We also need steps to view the Xray gadgets in the Confluence.

The beta version of the Confluence application is available here

Reference Jira Suggestion: https://jira.atlassian.com/browse/CONFSERVER-98800