Thank you for your question. Each person's reward is in accordance with the tests they face in relation to the gifts and abilities they have been given. As such people who are not born infallible will not be judged in the same way that the Infallibles (as) are. But at the same time, they are also not tested with the responsibilities of the Infallibles (as), nor are they rewarded in the same way. Infallibility is a knowledge that keeps a person away from sin and mistakes. It does not remove the free choice and therefore does not negate the applicability of reward for great actions.
May you always be successful