I found this website while looking for admissions requirements for nursing programs. This is a University in Saskatchewan offering Undergraduate and Graduate programs specifically for Indigenous peoples. It is also unique in the fact that both campuses (Regina and Saskatoon) are on reserves.
While they don’t have a specific nursing program, they do have an undergraduate degree program in Indigenous Health. I wasn’t able to view the specific admission requirements for the program without actually applying, but there does seem to be supports in place to help students apply and succeed to this University program. They also offer some graduate level programs, such as Master of Indigenous Education.