How to add product description under 3rd party custom product page

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I am using a 3rd party software on Motion theme called MyCustomizer to give my customers the ability to design their own photo frames. However, in the theme it is NOT letting me add any description underneath the product page UNDER ADD TO CART (like product.sections template layout). I would like to add more info and images/ text and reviews pls.

current view.pngdesired view.png

Any help would be appreciated!