My evidence is this YT video where he says so himself, posted to his own YT channel (titled “הרב דוד לייבל: “זה מה שצריך לקרות כדי שנתגייס):
The heads of the IDF didn’t actually de-Shemadify the army, even according to him (yet).
Note: Unsure what happens in reality in his Hesder yeshiva or the “Kodkod” program, though. Sadly, I don’t think Rabbi D. Leibel deserves much respect, as I demonstrated his character here (Hebrew).