If you are asking if the NCAA allows stacking for Div 2, yes. If you are asking if a particular school allows it, you’ll have to ask the college. Also, merit from a school can be stacked but need based financial aid from the school cannot stack (well it can, but it counts against the coach’s total, so the coaches don’t allow it as the math is just too confusing).
My daughter played lacrosse at a D2 in Florida. She stacked her merit, athletic, and 2 grants (available to all students, not just athletes, and not based on need) from the school. She also had a Florida resident grant, bright futures, SEOG, a Pell grant, and another Florida need based grant. Stack 'em up!
I love D2 athletics. It worked very well for my daughter, athletically and financially.