Interestingly I get a sense among most young people in Northern Ireland that they are pro-union while very distinctly categorising NI as a country in itself.
There is a party called the Alliance party that is attempting to offer an alternative to tribal politics of DUP/SF and they did quite good in recent election.
Even with that being said, I think most younger people see the Union as a good thing, if even in just the economic sense.
Somewhat less so than before Brexit but still the finances of NI look dire if they left the union.