Connect my SquareSpace e-commerce to 3rd part different e-commerce and work as a dropshipper

Site URL: https://www.mcrshirt.com/

Hi,

I would like third party e-commerce (Shopify, Woocommerce, Magento, etc) connect and sell my Squarespace inventory, so I can sync my inventory with external sales and work like a kind of dropshipper.

Is there any extension I can use or vendors can use to connect to my Squarespace? Or do I need a code injection?

Thanks for help.