Probably this is also about the new label? https://newlabel.ch/
The changeover will take place in March 2021, it's a pity that digitec doesn't refer to it anywhere...

Hi, until March 2021, this monitor fell under category A. Due to the very strong change in the evaluation of efficiency, this monitor now falls to category G. Nothing has changed in the power consumption, only in the evaluation of it.

Energy class A.

According to Dell's product website (https://www.dell.com/de-ch...), it is Class A.