7 verses have
if
in Edition Clear Qur'an by Talal Itani / Ad-Dukhaan (The Smoke)

44:7Lord of the heavens and the earth and what is between them, if you know for sure.

44:8There is no god but He. He gives life and causes death—your Lord and Lord of your ancestors of old.

44:12“Our Lord, lift the torment from us, we are believers.”

44:21But if you do not believe in me, keep away from me.”

44:36Bring back our ancestors, if you are truthful.”

44:39We created them only for a specific purpose, but most of them do not know.

44:42Except for him upon whom God has mercy. He is the Mighty, the Merciful.