A persistent claim of the Irish Government, fully backed by the EU, is that an invisible border is necessary to protect the Good Friday Agreement. Not only does the Good Friday Agreement not mention the border but it also makes little reference to the EU other than to note its existence.

https://briefingsforbrexit.com/brexit-and-the-irish-border/

The Irish foreign minister Simon Coveney recently made the unhelpful comment that he hoped to see Ireland united in his “political lifetime” – one would assume he meant in the next twenty or so years. It would be helpful, to say the least, if Irish politicians would respect that part of the GFA which states that is the wish of the people of NI to remain within the UK. Continued references to Irish Unity are a form of political harassment which could at some stage inflame loyalist opinion.

https://briefingsforbrexit.com/brexit-and-the-irish-border/