Access Square catalog SKU code

Hello all. I’m trying to access the SKU codes relating to Square catalog items but it isn’t a mappable field available in any of the Square modules.

The SKU code does seem to be available via the API, but I’m at a loss as to how to pull it in to my scenario.

Here’s a couple of relevant articles from the Square API documentation - Commerce / retrieve orders - CatalogItemVariation

I’d be very appreciative if someone could point me in the right direction!

Best wishes, and thanks in advance