Thanks for posting in the Community!
It's good to hear that your recurring invoices have been created, and sent from QuickBooks Online. As per checking, there's an incident overnight that caused intermittent outages for QuickBooks Online accounts. Rest assured, all services have now been rectified, and there shouldn't be any further issues.
You can also check this article to learn more on how to check your recurring invoice set up: Create recurring transactions in QuickBooks Online
Feel free to contact us back if you need more help with your QuickBooks account. Have a nice day!