No.
A good credit report or high credit score alone does not guarantee loan approval.
iScore helps the bank assess risk, but the final approval decision rests with the lender, who also considers income, current obligations, repayment ability, product policy, and required documentation.
Think of your score as an important part of the picture, not a "pre-approval." If your application is rejected despite a good report, ask the bank about the reason or factor that prevented approval instead of unnecessarily trying to raise your score.