Outdated software also causes sound pending find my iphone issue it also interrupts the airpod connectivity with the device. Read the steps below to update your IOS device:

1. Go to settings and select the general option 
2. Now select the software update option from there then select the download and update option.
3. After this, you need to type your device password and hit install.

To learn more insights read – https://techquerry.com/find-my-airpods-sound-pending-heres-how-to-find-it/