Swipe down from the top-right corner to open the .

: Once audio is added to all slides, tap the More (...) button, select Export , and choose Movie to create a video file where the slides advance automatically with your voice. Alternative: Using a Third-Party App Record Keynote presentations on Mac - Apple Support

Find and tap the green plus icon to add it. Set Up the Recording : Open your presentation in Keynote.

Tap the red status bar at the top of the screen (or the red clock) and select . The video will be automatically saved to your Photos app. Method 2: Record Audio Directly on Slides