How to promote user as flow admin.
By default, all flow members can edit flow settings, people and integrations. This allows flexible use of flows for all of your organization's purposes.
When flow-level administration mode is activated, only flow admins can add or remove flow members, manage integrations and modify flow settings (eg. open or invite-only).
Flow-level administration mode is active. Flow creators become the initial flow admins. Flow admins can promote existing flow members to flow admins.