How can I connect multiple Shopify stores to a single Xero account using the Xero Sync app?
Xero Sync does not support connecting multiple Shopify stores to one Xero account. Each Shopify store requires its own Xero account.
A workaround that can be explored would be to connect Xero Sync to one store, export your orders, disconnect your store from Xero Sync and connect the same Xero account to another store. You would need to repeat the same steps each time you need to switch from one store to another.