1- It is possible to reach such a point. It doesn’t mean all the stories passed down about such people are all true and accurate, but it is definitely possible to have such people.
2- One can achieve such a high rank by dedicating every action for Allah, by removing all arrogance from the heart, by avoiding all sins, by truly feeling the pain of Imam Zaman’s absence and also thinking of him and praying for him regularly, and by serving believers and sacrificing for them. If one manages to fully let go of their ego and truly be servants of Allah in everything that they do, then reaching such a point becomes possible.