The 11.1% figure refers to the ADJUSTED gender pay gap, not the unadjusted one. The unadjusted gender pay gap was higher: 11.8% according to De Poli and Maier (2024) or 12% according to Eurostat's official 2023 data.
The MEP appears to have conflated 'adjusted' and 'unadjusted' gender pay gap figures.
The most recent official Eurostat figure for the unadjusted gender pay gap in the EU is 12% (2023 data).