Hello,
I saw the screenshot you added. You need to specify the data source of the product grid/carousel element of the Wp-Bakery page Builder.
Edit the page with Wp-Bakery page Builder >> Edit the Grid/Carousel element >> Select Data Source there are a variety of options available that you can use according to your requirements.
Screenshot for Clarification: https://www.screencast.com/t/kMpTg4A2U
If this doesn’t help you then provide with admin panel login details of the website to check it myself and help you out accordingly.
Best Regards.