Under the Catalog a banner will show-up at the bottom of the page which will will take you directly to the option of requesting a new product (under the tab "Explore Products") or even a new supplier (under the tab "Explore Suppliers").
If you still have any issues with this, please get in touch with GelatoConnect Support via mobile app, desktop, or by writing to [email protected] and tell the team what are your needs and which products you would like to see added to the current catalog.