Square Online Item Sync
When you first set up Square Online in your Square account, item information will sync between your Square Item Library and Square Online. After the initial setup, syncing will continue automatically in the background with some exceptions.
What Doesn’t Sync
Other Sync Settings
If items aren’t syncing between Square Item Library and Square Online:
From your Square Item Library, check your item variations and be sure there aren't two or more items with the same name.
If there are (even if these items have different prices or SKUs), differentiate them by adding a "." (period), "-" (dash), or "/" (forward slash) at the end of one name.
Doing this will cause items to resync.