Good old An Post! I think that they're so overwhelmed between COVID, the resultant increase in online shopping in the last year and recovering from the Christmas rush that they are just not bothering with customs checks and charges
None of my parcels from the states have had charges, regardless of the value and what has been declared, since the the start of COVID and neither has anything from the UK since brexshit! Long may it continue! Paying zero VAT on stuff is not going to have me complaining!
That said those shitty courier companies have been all over customs charges for stuff from the UK so that they can charge their exorbitant admin charges! Yuck!