My iPhone shows a podcast playing but there is no sound.

If you're having trouble with sound in the Podcasts app on your iPhone 13 Pro Max, there are a few steps you can try to resolve the issue:

1. Check the volume: Make sure that the volume on your iPhone is turned up and that the mute switch is not engaged. You can adjust the volume by using the volume buttons on the side of your iPhone, or by using the volume slider in the Control Center.
2. Restart the Podcasts app: Try quitting the Podcasts app and restarting it. To do this, double-click the Home button, swipe left or right to find the Podcasts app, then swipe up on the app to close it. Then, open the Podcasts app again.
3. Check for updates: Make sure that you have the latest version of the Podcasts app. You can check for updates by going to the App Store and tapping "Updates."
4. Check your network connection: Make sure that you have a strong internet connection. If you're having trouble with your Wi-Fi connection, try turning it off and on again, or connecting to a different network.
5. Check your audio settings: Go to "Settings" > "Sounds & Haptics" and make sure that "Change with Buttons" is turned on. If it is turned off, try turning it on and see if that resolves the issue.

If the issue is still not resolved after trying these steps, you may want to reach out to Apple Support for further assistance.