You've missed the point. There are two buckets of money.
BUCKET ONE: Revenue sharing. This money is what it sounds like, a sliver of the overall money earned by the athletic department in media payments, ticket sales, concessions, etc. This is reserved for schools that opt-in and is capped at $20.5M for the entire athletic department. Schools are not required to spend all $20.5M. Schools aren't even required to spend $1! There is going to be a wide gap between opt-in schools. It's unlikely many schools opting-in will be spending much on hockey. Some will (Denver, for sure). Some won't (I can't imagine Ohio State spends any of its $20.5M on hockey). Some will fall in the middle (Minnesota?).
BUCKET TWO: NIL. NIL is money paid from a third party to an athlete for endorsements (nominally). This is completely detached from the opt-in and opt-out decision. Every school can organize as much NIL as they want whether they opt-in or not. Maine could go to LL Bean and organize $40,000,000 in NIL money available to its athletes even though Maine opted out. There's no cap.
My point is that UConn, despite being an opt-in school, is unlikely to be making much money from Bucket One to its men's hockey players. They aren't going to have the full $20.5M, they are going to need to spend a lot of money on men's and women's basketball to keep those programs at a level to win national titles, they still have an FBS football program, and they have like 10 sports they are trying to win at. I'd imagine that any money being made available to Marques is coming from Bucket Two. And Maine can spend money from Bucket Two just like UConn.
There are going to be "Opt Out" hockey schools that have higher roster "payrolls" than "Opt In" hockey schools. North Dakota is going to outspend Notre Dame on ice hockey, for example.
Number two is changing and it’s going to look different than it does now. Players are going to have to report all deals over $600 and some third party needs to sign off on them.