Can’t recommend a solution for you. But I’d point out that if you find someone who’s offering you “THE agile EV solution”, your spider senses should start going off like a there’s a five alarm fire. Whatever system you find will have to be modified (continuously) to fit your current process and in response to your modifications to that process as you refine it.
I am doing Earned Value using a resource loaded schedule at my business. We are not doing agile, but we are doing rolling wave planning, which might be similar in some ways. Do you have a specific question?