Connect Prinful Shipping options to Squarespace checkout page

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

Hi,
Recently I upgraded my Prinful account to Premium to use some great features including shipping options from FedEx, Ups & Some more. Prinful has an automated integration with services like Shopify, Etsy, woo commerce and more. So you just need to activate your desired shipping option in Prinful once, then they will add it automatically to the services mentioned above. A customer now has different choices on the checkout page for shipping.

I tried to do it for my Squarespace but they (Prinful) said apparently SQS doesn't support it yet. So I have to go manually add ship methods in SQS just a customer select one, and for fulfilling it, I have to go to Prinful and manually choose what the client selected in square space.

I wanted to know if there is another way? Code or Add on to make this automated? 
Sorry for the long text,
Best,
K.

2 hours ago, Kayvi said:

Connect Printful Shipping options to Squarespace checkout page. I wanted to know if there is another way? Code or Add on to make this automated?

This isn't possible on Squarespace, with code or anything else. The checkout cannot be modified.