Built-in sounds is a shortcut that uses the background sounds feature in iPadOS and iOS settings

You can choose from a menu

1. Ocean
2. Stream
3. Rain
4. Dark Noise
5. Turn off the sounds

Then after that you have the option between

1. 15 minutes of playtime
2. 1 hour of playtime
3. 2 hours of playtime
4. Or no set timer

Please the COMMENT when you download this shortcut