With the possible exception of Ireland, (not sure anymore), Church attendance in all of the countries you mentioned is extremely low.
Perhaps we should try somehow to distinguish between practicing and non-practicing.
Church attendance is just another part of being a baptized member of the Catholic denomination, just as voting democrat is for Catholics in America, and whatever they vote for in the catholic nations of Latin America and Mexico.
As with most western countries, Ireland is dominated by one religion: secular socialism.
What’s the difference?