You don’t need to Bind Event. If you have Flipbook selected in MyBlueprint tab, you can right-click and search for OnFinishedPlaying Event. You want to make sure that your Flipbook is NOT looping, or it will never finish playing.
A simple setup would look like this:
In your case, it might look like this:
Setting a Name variable lets us check in OnFinishedPlaying event to see which Flipbook has ended. This way, if you have multiple places where a Flipbook ends, it will only perform actions you specifically want it to in particular instances.
I hope that makes sense. Let me know if any of that is unclear.
EDIT: Whoops, forgot to set Looping to false in that second image. But I think you get idea =)