As you can see, LitExtension can only support to migrate Products (and their related information: Name, SKU, Short Description, Full Description Price, Special Price Product Tags Attributes: (Name, Values), Options: (Name) Variants: (SKU, Weight, Quantity, Price, Special Price, Length, Width, Height) Additional Images Quantity) and Categories (Name, Description) to Squarespace.
Other than the mentioned data above, we do not support to migrate any more data (namely customers, orders, blog posts, CMS pages, Reviews, etc.) due to the API limit of Squarespace. The Squarespace Commerce API does not allow any third-party plugins to import these types of data. However, please feel free to contact us if you are ready to skip the unsupported data and initially move the products, categories to the new store. We are so eager to help!
Further information regarding our Squarespace Data Migration Service can be found here.
In case you have any other questions, please reach out to us via: