Donating to their alma mater Ivy League schools multi-billion dollar endowments or other elite private schools. The argument that CT is wealthy and, thus, UConn should have strong backing or be flush with money is flawed. The big money in the uber-wealthy parts of CT isn't coming from 9-5 insurance company managers or directors around Hartford's suburbs. In-state students and alumni who choose/chose UConn factor in either scholarship or lower cost for a valuable education, which is usually the opposite of what the very wealthy do.
I could be wrong, and correct me if I am, but our last president, with the goal to keep UConn growing and academically competitive, opened the doors to more and more wealthy international students paying out-of-state tuition from Asian countries like China over in-state tuition students, and that the best /most expensive apartments in downtown Storrs (which I question the long term viability of) were often occupied by them. I seriously doubt the university can tap into that pool of alumni for NIL.