Bhagavad Gita, Chapter 18, Verse 72

Has this been heard by you, Pârtha, with an attentive mind? Has the delusion of your ignorance been destroyed, O Dhananjaya?

Krishna checks in directly here, a real, simple question after everything just taught.

This isn't rhetorical flourish, it's framed as a genuine pedagogical check, has the teaching actually landed. Real concern for Arjun's actual understanding closes out the instruction itself.