Solution Steps

1. Open Settings → Control Center → Customize Controls.
2. Add "Screen Recording" to Control Center.
3. Open Control Center (swipe down from top-right on Face ID, or up from bottom on Touch ID).
4. Tap the record button (circle icon).
5. Wait 3 seconds, then recording starts (red indicator appears).
6. Tap red indicator → Stop to end recording.
7. Recording saves to Photos app.