Effectively measure and track the value delivered by Agile Scrum projects.

I'm struggling, a little, with your question because, in my mind, a project only delivers the potential for value. Delivering something on time, budget, and scope can increase the likelihood of the product producing value, but value cannot be realized until after the product is delivered, and then it takes time. Once the product has been delivered, it doesn't matter if the project approach was agile, "traditional", or hybrid. You're now dealing with estimates and milestones for value realization.

If you're using an agile approach and are able to deliver usable product iteratively and incrementally before the project is complete, you can start measuring value before the product is complete. However, regardless of the project approach, it's not usually the project manager who is measuring the value delivered by the product.

I'm not sure I've answered your question. What am I missing?