Hi there, at the moment it is not possible to add the cart icon into your menu bar, althrough that is something we are working on for a future update.
In the meantime you can add the mincart module to your page by going into the Modules > E-Commerce Modules section in the sidebar and dragging and dropping the Ecommerce Minicart module onto your page.
Most frequently asked questions will be found inside our community. If you would like to contact us directly we’d love the opportunity to help you. Chat with us online by clicking the message icon on the bottom right side.