Notification in a multi-approval document

I’m trying to add a notification for a custom doctype. It should work as follows:

  1. The L1 Manager approves the request.
  2. Once the workflow status changes to “Approved by L1,” a notification should be sent to the L2 Manager for approval.

In my case, the L1 notification is working fine, but the L2 notification is not working.

Below is the condition I’m using for the L2 notification:

doc.workflow_state_rfa == "Approved by L1"