Yes there is a solution to the Irish border problem! technology and intelligents lead corporation, seize, consfiscate, return, and let the peoples of Ireland carry on with there lawful busines !
Considering there is already a 500 page document and both sides can agree on 495 of those pages, I'm confident that both sides can find away around the northern Ireland part which is the only part not acceptable to the uk, if the EU want to be so intransigent and unwilling to try a find away...