Air quality in Dublin, Ireland vs. Amsterdam, Netherlands

Hi all, Dublin resident here, trying to figure out some data related to car pollution. I stumbled across this google study: https://insights.sustainability.google/labs/airquality?hl=en-US which purports to map out the air pollution in a few cities in great detail (hyperlocal, street-by-street, air quality data). Remarkably, Dublin seems to come out on top. This is flabbergasting to me, a resident of this car riddled city. I am especially surprised that the average Nitrogen Dioxide levels in Dublin seems to be about half that of Amsterdam (in my mind, a cycling utopia). What am I missing here? I can see that the data from Amsterdam is pre-pandemic and the Dublin data is post-pandemic. Is that the major difference? I can also see the Amsterdam data seems to contain a ring road (or two) whereas the Dublin data is missing the M50. To be honest, I am surprised that the Dutch levels are high at all (even in 2019) , I found some info on the modal share of Amsterdam from 2018 that suggested only 20% use private cars with the rest cycling/walking or using public transport (https://www2.deloitte.com/content/dam/insights/us/articles/4331_Deloitte-City-Mobility-Index/city-mobility-index_AMSTERDAM_FINAL.pdf). Any insights welcome!