After designing, testing and saving your flow, you have to submit the flow for approval before it can be deployed to production. When a flow is submitted for approval, an approver will be required to review the flow and approve or decline the flow. Although all users can view flow details, only people in your organization who have been granted the correct permissions will have the ability to approve (or decline) and deploy flows. Once it has been approved, the flow must also be deployed by the approver - this will then deploy the last saved version to production.
Note: you cannot approve a flow if you are the author/creator of that flow yourself. You require another person from within your company (with ‘admin’ rights) to approve your flow.
Please refer to the Approving and Deploying Workflows section of the Chat Flow User Guide for full details.