There were claims a few years ago of this happening by now but what the studies show, is that even a Catholic majority doesn’t result in an upward trend for a United Ireland.
In a 2018 poll, 45% said they were Catholic but only 25% said they were solely Irish as their identity and that roughly translates into unification supporters.
So Catholicism might overtake Protestantism in NI, or may have already, but only just, but it’s not going to be enough to move enough into the direction of independence.
Independence in NI is less popular than Scotland was in 2014.
The vote is never going to be held anyway, there’s too much at stake.