Does repentance from a sin restore one's status and rank in Paradise, what are the deeds that lead to the highest ranks of Paradise, and is there a status higher than Al-Firdaws?

Steadfastness comes from Allah. Therefore, a Muslim should seek His help and frequently supplicate to Him to keep him firm in his religion and turn his heart towards His obedience. If he commits a sin, he should repent and not despair, for sincere repentance, coupled with performing effacing good deeds, may make a Muslim better than he was before the sin, and Allah may raise his rank through it.

Among the deeds that lead to Allah's pleasure and Paradise are: performing the obligatory duties, striving in supererogatory acts as much as possible, including voluntary prayers, fasting, charity, Hajj, and Umrah, frequent remembrance of Allah, and showing kindness to people, such as visiting the sick, attending funerals, assisting the distressed, supporting the oppressed, and striving for a Muslim to be close to his Lord in all his affairs.

The highest rank in Paradise is Al-Firdaws, as stated in the Hadith: "So, if you ask Allah, ask Him for Al-Firdaws, for it is the middle of Paradise and the highest part of Paradise, and above it is the Throne of the Most Merciful, and from it spring forth the rivers of Paradise." "The middle of Paradise" means the most just and best or the widest part, and "the highest part of Paradise" means its loftiness and elevation.