You can move the add to cart button above your product description within the built-in theme settings!
Step 1: From your Shopify Admin, head into your Theme Editor (customize)
Step 2: Navigate to a product page on your site so the Sections update in the theme editor.
Step 3: Under Sections click into Product > Scroll to Description position.
Step 4: Select the "below add to cart" option:
I hope you would find it relevant
Let me help you.
their is section in the shopify, for it whatever you want. check it out their.
In theme setting or in the customization.
If you not able to do that, Then please contact us. we can provide the perfect solution for you.