Conclusion: Whatever the people of Paradise wish for, that is what they will enjoy, according to their status and level in Paradise, and Allah will make them pleased with it. They will not envy those who are above them, and no desire for a higher status will undermine the bliss they have. If the wishing was absolute, as the questioner understands it, then it would be possible for one of the people of Paradise to want the status of the Prophets and ask the Lord of the Worlds for that, but it is known that this is impossible. Otherwise, there would be no meaning to the superiority of a Prophet over others, and the superiority of the one who strives hard in righteous deeds over the one who does righteous deeds but does not strive hard, or the sinner. And Allah knows best.

Muslims believe that there are levels in Jannah and that Allah has promised those who obey Him places to dwell in Paradise in return for their acts of obedience. The people of Paradise will vary in the bliss they enjoy in Paradise, according to the levels they attain. It is not possible for those who are in the lower levels of paradise to attain what is in the highest levels.