Hello,
Thanks for contacting us.
Please watch this video – https://youtu.be/LgzC4iK-j6A
In your case, go to Theme Options > WooCommerce > Single product builder > place Add to Cart element into page content, for example – https://gyazo.com/ca4332ff46fa62a4f9f0d47795c1c74e > https://gyazo.com/18fbbaf1e98c9ed38c4f087caa67b678
Regards