Staying here after 2 years doesn't allow that person to apply for immigration. They would have to apply either as a skilled worker or be sponsored by a family member. None of this relates to visitor visa or supervisa.
Not enough for low-income cut but can somebody sponsor them and apply for them as immigrant even it's not related just Canadian friend willing to sponsor them?
If this is your parents and they're old, the only way they can come here permanently is if one of their children sponsors them. The child must have 3 years of income above a certain level.
