Will everybody in jannah meet the Blessed Prophet Muhammad?

We know that all our wishes in jannah will be given. What about seeing our Prophet (pbuh)? Will we see him whenever we wish, although he will be on the greatest level of jannah?

There shall be no trouble in it, nor shall they be exhausted therewith.” (Surah al Saffat; 46, 47)

There is no trouble and sorrow in jannah. A believer in jannah, whenever he wishes to meet the Blessed Prophet (pbuh) or anyone of the people of jannah, will meet them although they are not at the same levels of jannah.

"Everyone will be with those whom he loves."   

It is obviously stated in the hadiths that those who love the Prophet (pbuh) will be with him in jannah:

Narrated 'Abdullah bin Mas'ud: A man came to Allah's Apostle and said, "O Allah's Apostle! What do you say about a man who loves some people but cannot catch up with their good deeds?" Allah's Apostle said, "Everyone will be with those whom he loves."   (Bukhari; Adab; 190)

Narrated Anas: A bedouin came to the Prophet and said, "O Allah's Apostle! When will The Hour be established?" The Prophet said, "Wailaka (Woe to you), What have you prepared for it?" The bedouin said, "I have not prepared anything for it, except that I love Allah and His Apostle." The Prophet said, "You will be with those whom you love." We (the companions of the Prophet) said, "And will we too be so? The Prophet said, "Yes." So we became very glad on that day. “(Bukhari; Adab; 188)

How will those who are at different levels of jannah see eachother? Isn’t it unjust for those who are at upper levels?

“We shall allude to this elevated truth with a comparison.

For example, a magnificent personage set up a vast banquet and finely-adorned spectacle in a splendid garden. He prepared it in such a way that it included all the delicious foods that the sense of taste can experience, and all the fine things that please the sense of sight, and all the wonders that amuse the faculty of imagination, and so on; he included in it everything that would gratify and give pleasure to the external and inner senses. Now, there were two friends and they went together to the banquet and sat down at a table in a pavilion. But the sense of taste of one of them was very limited, so he received only minor pleasure. His eyes could see only a little, he had no sense of smell, and he could not understand the wondrous arts nor comprehend the marvels. He could only benefit from and take pleasure in a thousandth or even a millionth of that beautiful place, to the extent of his capacity. The other man however had developed his outer and inner senses, his mind, heart, emotions, and subtle faculties so perfectly and to such a degree that although he was next to his friend, he could perceive and experience all the subtleties and beauties and marvels and fine things in the exhibition, and receive their different pleasures.

Since this confused, sorrowful, and narrow world is thus, and although the greatest and the least are together, the difference between them is as great as from the ground to the Pleiades, surely in Paradise, the realm of bliss and eternity, while friend is together with friend, each will receive his share from the table of the Most Merciful and Compassionate One in accordance with his capacity and to the extent of his abilities. Even if the Paradises in which they are found are different, it will not be an obstacle to their being together. For although the eight levels of Paradise are one above the other, the roof of all of them is the Sublime Throne. If there are walled circles round a conical mountain, one within the other and one above the other from its foot to the summit, the circles are one over the other and look to one another, but do not prevent each other seeing the sun. There are also various narrations of Hadiths indicating that the Paradises are in a manner close to this.”

(Badiuzzaman Said Nursi; The Words; 28. Word)

People from different levels can meet and gather at the same banquets or gardens of jannah. However, the taste and reward they get from the same gatherings will not be the same. For example, imagine a sick and a healthy person eating the same cake, is the taste they get the same? Although they exactly eat the same food, the taste they get depends on their health. Similarly, gathering and meeting of people from different levels will not be unjust; because the reward and taste they get from the same banquet will be as much as their good deeds.