No. Once a phone number is registered on the WhatsApp Business Platform for use with Mocean API, it can no longer be used on the WhatsApp mobile app.
For further assistance, do raise a support ticket with our Support Team at support@moceanapi.com.
What is the maximum number of phone numbers a WhatsApp Business Account (WABA) can register?
How is WhatsApp different from WhatsApp Business?
What happens if I send a WhatsApp message to a WhatsApp user that has blocked me?