The Torah has already promised that, in the end, Israel will repent at the end of their exile and immediately they will be redeemed.

5842. Forgiveness Is Immediate, Redemption Comes in Its Order – On Iggeres HaTeshuvah, Chapter 11 הסליחה תיכף ומיד והגאולה כסדרה – ביאור דברי אגרת התשובה פרק יא