edit: nevermind, I figured now it is talking about total energy consumption, not just electricity. It's just a coincidence that the 22% matches up with wind+solar for electricity.

It's a little bit confusing, as renewables generally includes hydro and biomass. While the cited numbers are rather only wind+solar. If you include the others, renewables had a share of 38.6% in 2022 in the EU. 22% are just wind+solar, so I think that this article solely refers to those and their doubling.

The EU increased its solar share from 3.33% in 2014 to 7.27% in 2022 in the course of eight years. And it's wind share from 7.86% to 15.01%. So, a doubling over the next eight years is essentially just a continued exponential projection of the trend so far.

Which shows how unambitious the previous goal was. Now with the expectation of rising electricity demand, due to electrification of other sectors, this increase in share amounts to more absolute increases, but still, it appears like a fairly realistic target.