Sorry to say but as far as we are seeing, the Rating Stars are appearing fine on your Site for the Single Product page under the Elementor editor and on the Product Preview too: https://snipboard.io/f9J2px.jpg
Please check back your Site after completely clearing browser and server cache.
I’m so happy to hear you are pleased with the Theme and Support. XTEMOS strives to deliver the best customer experience, and it makes our day to hear we have accomplished that.
We count ourselves lucky to have you as a customer. You can always reach us at any time. We are always here to help you.