Add to bag buttons come with Business plans which include the e-commerce platform. You can easily link these buttons with your products.
Expand the Add elements panel on the left, find the Add to bag button, and drag and drop it anywhere on your page:
Click on a button to see more options (edit, duplicate, manage visibility, delete):
Select Edit button to open button settings:
Link the button to your product
Rename the button
Change the following: