Much as Ireland is famously over-represented in GDP stats, the Netherlands is famously over-represented in goods export stats, because of trans-shipments through Rotterdam. The effect of trans-shipments on trade statistics is a rather more pervasive issue than the Irish GDP issue.
Looking just at goods exports you tend to get funny numbers. You need to look at goods imports and services trade too to get an overall picture. There are measurement problems with services trade. And there are general problems with trade stats, because when you add them up the world has a substantial trade deficit. Some if it is lost in transit, and there's smuggling and the black economy. But there isn't a convincing explanation for the magnitude of the number that comes up, and what we ought to do about it in consequence.
But, oh look, we tore up our trading agreements with our nearest neighbours, which had knock-on effects for everywhere else we trade, and now our export growth is a whole load less than theirs, what a surprise.
Though I wonder what the net position is. People trying to import components from the continent tell you it is a nightmare these days. So import growth might also have been slowed.