Open Matinee button is missing in UE 4.24

I placed the matinee in scene , but matinee editor is missing and can nor find the open matinee from detail panel… plz help with this

From the docs:

As of Unreal Engine 4.24, you can no longer access the Matinee Editor from the Cinematics Menu and Details Panel. This is part of the transition to remove Matinee from UE4 completely in 4.25. You can still convert Matinee actors to Sequencer assets using the Matinee to Sequencer Conversion Tool.