Here is one item:
D27AZD7JGVO6NTTKPQ4SITBA
It isn’t just this item. It is all of the items in her inventory. They do not come across in the item_data like you described when making the List Catalog API call. It appears that the descriptions visible on her website for all the products created in Weebly, sync in that I can access the name, id, price, variations… etc. However, description is not one of the synced details.
Stephen, I should mention this topic is related to another question I posed regarding the syncing of Weebly created products to the Square database.