Based on the knowledge sources, I can see one likely reason why Mirror sync may not be available in your new project setup.
Mirror Requires Admin or Owner Project Role
To set up Warehouse Connectors (including Mirror syncs), you must have an admin or owner project role on the project. [Warehouse Connectors] If your service account was set up with a lower permission level on the "New Production" project, Mirror mode would not be accessible.
Please verify that the service account (or the user configuring the connector) has admin or owner access on the new project.
Other Things to Check
- 1.
Paid plan requirement: Warehouse Connectors (including Mirror) are available as a free add-on only for organizations on a paid event-based plan. [Warehouse Connectors] Confirm your plan covers this.
- 2.
Warehouse source setup: Mirror requires additional source-level configuration in your warehouse (e.g., for Snowflake, change tracking must be enabled; for Databricks, Change Data Feed must be enabled). [Mirror sync] If you're connecting to the same warehouse source as before, this should already be in place — but it's worth confirming the warehouse connection in the new project is fully configured, including the dedicated staging schema/database required for Mirror.
- 3.
Mirror is not supported on views: If your warehouse table is actually a view rather than a base table, Mirror will not be available. [Mirror sync]
If none of these apply, the knowledge sources don't contain enough detail to pinpoint the exact cause. I'd recommend reaching out to Mixpanel support directly, as there may be account- or project-level enablement needed on their side.
