Title IX, generally speaking, says schools that take federal money must treat men and women similarly in their athletics departments. Specifically, it says financial assistance (scholarships) must be similar and benefits and treatment in other components (equipment, travel expenses, locker rooms, etc) must be similar. That has generally shaken out as ... if a school gives out $250k in athletics scholarships to men, it needs to be pretty damn close to the amount given to women.
How does that apply to NIL? NIL isn't given by the schools; it is given by the "businesses" making the payments. So Title IX has no effect on NIL at all. Revenue sharing on the other hand? Under current Title IX, a school would be required to "share" the same amount with women as it does with men. However, if the revenue sharing was from the NCAA entity (as opposed to the individual schools) there is enough wiggle room there that it would
