From what I understand, the 1883 is just a brokerage, not a source of funding. Not much info about NIL on the Internet, but from what I've read NIL money comes from businesses, private sponsors & boosters of which a collective can solicit money from; not the school itself. I would imagine that because UND hockey is so popular in GF & the biggest show in town (borderline cult-like), that there would be some wealthy alumni & local businesses supporting the 1883 for hockey purposes.
Just last summer, Dan & Jolene Mikkelson of GF donated $2 million to the hockey program for scholarships. Would be nice if they could use some of that money for NIL purposes, but perhaps the Mikkelsons want it to go solely for scholarships. Then you have the Englestads, Rydell & other very wealthy locals that you would think are gifting NIL money for the hockey program because it's such a staple there.
You would probably see more NIL contributions if the IRS classified it as a tax deductible donation, which it currently is not.