Why is Iran's new supreme leader Mojtaba Khamenei not appearing on camera? Reports about injury, coma rumours and war message explained

Why is Iran's new supreme leader Mojtaba Khamenei not appearing on camera? The 56-year-old leader issued his first message during the war with the US and Israel but did not appear on video. Reports mention injuries from an airstrike, coma rumours and security concerns while officials claim he is safe.