Is it possible to use roc auc metric in uplift modeling (class transformatio approach)

I do not understand why in uplift modeling (Class Transformation approach) not used ROC AUC score for changed target Z.

I have a problem with a task where I tried to use this approach, but ROC AUC score have a dramatically low value. At the same time, I could not find any mention of using ROC AUC score for evaluation quality of the model which used Class transformation approach for uplift prediction. As a result I do not understand if it is correct to use roc_auc for z in this case