Orders did not export to Xero automatically. Is it possible to manually export the orders for this period?
A manual export can be generated within Xero Sync by setting a start and end date, then selecting the export button. More details on generating a manual export can be found here - https://support.boldcommerce.com/hc/en-us/articles/115001415186-Export-Orders-from-Shopify-to-Xero.