tripadvisor retriver number of reviewer reviews

Yes, when you download the reviews, it should also grab the total and avg from the source page. You can then access it with a badge.

how ? i talk about this 

Sorry, I misunderstood. That is not currently possible.

can you add this element to the scraper ? 

Actually, I was wrong. If you use the Get Reviews > Review Funnel to scrape the reviews that info is saved as part of the meta_data. You would need to set up a child theme for the review template in order to access it. More info can be found here...

https://wpreviewslider.userecho.com/knowledge-bases/2/articles/553-use-child-theme-to-customize-the-review-template-more

Tell me which review template style you are using and I'll send you the child theme file you can use.

and for export it? i need that data is exported in csv

Yes, the meta_data column is included when you export a CSV from the Review List page.