This EU commission page suggests that a human review should be conducted before a client is informed of the decision, not only in the case of an appeal.
https://commission.europa.eu/law/law-topic/data-protection/r...
https://commission.europa.eu/law/law-topic/data-protection/r...
> In addition, processing can significantly affect an individual if it influences their personal circumstances, their behaviour or their choices (for example an automatic processing may lead to the refusal of an online credit application).