Q: When will Apple Pay become available in Ireland?

Hi Tom

I'm afraid that no-one here can tell you anything about Apple's unannounced plans (whether, when, etc), as this is user-based technical support community. It is also not allowed here to speculate. Your best solution is to keep checking Apple's website:

Apple Pay participating banks and store cards - Apple Support

If you are keen to see Apple Pay launch in Ireland, you can also let Apple know here:

https://www.apple.com/feedback/apple-pay.html