If your annual increment has been withheld due to a suspension, even if it's now revoked and an inquiry is pending, you may have grounds to appeal. While increments can be paused during suspension, withholding them indefinitely without a penalty order after reinstatement is generally not permissible. You are entitled to a suspension allowance and the right to be informed of the inquiry's progress. Consider formally requesting the completion of the inquiry and appealing the non-release of your increment.