Do Allah forgive all sins I can say yes, Allah is the Most Merciful and Most Forgiving. The concept of forgiveness is existing in Islamic theology. However, the forgiveness of sins by Allah depends on certain conditions and factors. Here are the some key points to consider for all sins forgiveness.

1. True Regret: To seek Allah forgiveness, sinner must sincerely regret for their sins. True regret means feeling unpleasant for the wrongdoing, making an intention not to sin again, and seeking forgiveness with a deep honest heart.

2. Allah’s Mercy: Allah’s mercy is too big for all sins. The Quran mentions that Allah forgives all sins if a person regrets it. In Surah Az-Zumar ayat 53: “Say, ‘O My servants who have transgressed against themselves [by sinning], do not despair of the mercy of Allah. Indeed, Allah forgives all sins. Indeed, it is He who is the Forgiving, the Merciful.'”

3. Forgiveness Only Before Death: It is encouraged in Islam to seek forgiveness and regret for all sins throughout the sinner life. However, it is important that sinner should not delay regret until their deathbed because seeking forgiveness should only be done while a person is alive and able to fix his wrongdoings.

4. Rights of Others: It is important to note that some sins where sinner hurts other humans. In such cases, to seek Allah’s forgiveness, sinner is also required to apologize to that person for all wrong deeds done to him.

5. Intercession on the Day of Judgment: On the Day of Judgment, Allah may forgive some people sins through the intercession of the Prophet Muhammad or other prophets, depending on Allah will.

It is important to know that while Allah mercy is very very big but still we should be careful with our actions because forgiveness is not guaranteed without truthful Tuba.

Ultimately, the forgiveness of sins is a matter between you and Allah and it is only Allah will to forgive you with his mercy.