Link please.
There's plenty of links and articles, just look up 'Protocol 21' of the Lisbon Treaty, some light reading to get you warmed up.
Dáil Éireann debate - Wednesday, 1 May 2024
European Union Migration and Asylum Pact: Motion [Private Members] Dáil Éireann debate - Wednesday, 1 May 2024
www.oireachtas.ie

EU migration policy and Ireland
A humane, comprehensive European approach to migration is a priority for the European Commission and for Ireland.