Meta have confirmed the update is resolved

From - https://metastatus.com/whatsapp-business-api
"We have recovered from an earlier outage impacting Cloud API, and services have now been restored. We apologize for any inconvenience that this may have caused."

Meta is currently experiencing disruption with their WhatsApp Business API, Instagram and Facebook Messenger APIs - for more information see https://metastatus.com/whatsapp-business-api

We will automatically retry and failed deliveries. At present this is having limited to no impact on our customers, but we continue to monitor