I mean I already wrote this out in reply to another comment but by their own numbers on the site announcing this they say that all phones combined yearly consume ~ 5.2 TWh, that’s 0.2% of the EU’s total anual consumption of 2.7PWh. They expect to reduce the power consumption by 20% (which I find questionable but ok) by 2030, reducing the consumption by 1.1TWh, thats just 0.04% of the total consumption. It really doesn’t matter that much. And as for your comment, laptops are already also extremely efficient, so it’s not like their power consumption is that significant either.

For context, a day’s charge of a phone is equal to running a typical 2kW heater for 1 minute, a years worth of charge is equal to running it for 6 hours. I like the label and don’t think it’s a bad addition, I just feel that that information could have been replaced with more useful stuff (like how ethically sourced it was or how long it will be supported for), the energy efficiency feels more like doing it just so it looks the same as the other ratings without much purpose for it.