Coincidence. I was on a call last night with a similar local group where someone was wondering if they could make ethical decisions about choosing rented accommodation. I suggested they might ask to see an EPC but I had to mention that EPCs are just a rough indicator.
It would be great to be able to do what you suggest. However, how often would you find that measurements are even taken, let alone compared to an approved plan? Then there’s the question of why a landlord would bother produce anonymised data - probably a GDPR requirement if provided to a 3rd party.