Priority Boarding is enabled on my Railway account, but Sandboxes are still unavailable.

Project ID: 409d66c0-bddd-4a49-b3b8-73aee44de4f9

Observed behavior:

Priority Boarding is enabled.

The project UI has no Sandboxes tab.

The documented Sandboxes project route returns authenticated 404.

The account/project integrations expose no Sandbox create/list/exec/destroy capability.

Railway documentation indicates Sandboxes are available through Priority Boarding and does not document any additional workspace setting, plan requirement, propagation delay, or support-side activation.

Could Railway please check whether Sandboxes are actually enabled for this account/workspace and whether there is any account flag, propagation issue, or backend problem preventing access?

Please do not modify or deploy any project services or staged changes. I only need Sandbox control-plane availability diagnosed/enabled.