Stored XSS is found in Settings>Live help configuration>Personal Theme>static content. Under the NAME field put a payload {{constructor.constructor('alert(1)')()}} while creating content, and you will see that the input gets stored, and every time the user visits, the payload gets executed.
{ "nvd_published_at": "2022-01-27T06:15:00Z", "github_reviewed_at": "2022-01-28T20:00:43Z", "severity": "MODERATE", "github_reviewed": true, "cwe_ids": [ "CWE-79" ] }