Don’t post on a forum post that you have added only 3 hours ago, as it will put some forum users off helping you as it seems that you are demanding an answer.
As for you issue, you are using this Wix Stores tutorial.
https://www.wix.com/corvid/example/product-reviews
Have you simply added the onClick event handler needed to the button in the properties panel for the button.
Have you simply designed the add review lightbox on your mobile editor.
Have you got the right name for your Lightbox.
Have you made sure that all your own element ids on your page are the same as you have used in your code.