The short answer
If the live site looks different from the editor, the changes were not published. Click Publish in the widget editor.
If Publish is greyed out, there is nothing left to publish and your website’s own cache is serving an old copy.
Publishing
Edits in the widget editor do not go live until published. The button greys out when everything is published, which makes it a reliable test: if it is still active, that is your answer.
Website caching
With everything published and the live site still wrong, your site or CDN is serving a cached page. Purge the cache, or wait — most hosts refresh within an hour. WordPress caching plugins and Cloudflare are the usual suspects.
New reviews in the editor but not on the site
Same two causes in the same order. Publish first, then cache.