Siri doesn’t respond when cover is closed. Always listen for “Siri” or “Hey Siri” is turned on.

As the setting is already set to ON, Siri should respond while the iPad is locked.

If your iPad is not operating as expected, try a forced-restart - as this will often clear an isolated software issue:

Force restart iPad (models with Face ID or with Touch ID in the top button)

If your iPad doesn’t have the Home button, do the following:

1. Press and quickly release the volume button nearest to the top button.
2. Press and quickly release the volume button farthest from the top button.
3. Press and hold the top button.
4. When the Apple logo appears, release the top button.

Force restart iPad (models with the Home button)

Press and hold the top button and the Home button at the same time. When the Apple logo appears, release both buttons.

If the problem persists after performing the restart, it may be necessary to reset your iPad settings. While this reset will not cause any loss of data, as a precaution, it is always wise to ensure that you have a current iCloud or iTunes backup before performing the reset:

How to back up your iPhone, iPad, and iPod touch - Apple Support

When you are happy to proceed, you can perform the reset from iPad settings:

Settings > General > Transfer or Reset iPad > Reset > Reset All Settings

If the problem still doesn’t clear, the next step is to reset the iPad to factory settings:

Restore your iPhone, iPad, or iPod to factory settings - Apple Support

Otherwise, you would be best advised to seek assistance directly from Apple Support. You can contact the Support Team using the Support link at top-right or bottom-left of this page. Alternatively and perhaps easier, you can initiate and manage your support cases using the excellent Apple Support App. If not already installed on your iPad, the App can be downloaded from the App Store:

https://apps.apple.com/app/apple-support/id1130498044

You might also visit the Genius Bar at your local Apple Store or Apple Authorised Service Provider (AASP) - where the technicians will be able to test and assess your iPad - and you can explore your available options:

Genius Bar Reservation and Apple Support Options - Apple

Have you also enabled "Allow Siri when Locked"?

Settings > Siri & Search > [Ask Siri] Allow Siri When Locked - set to ON

Kenny_Ray wrote:

Thank you for your reply. I saw that suggestion elsewhere but I do not have that setting, at least not under Settings, Accessibility, Siri. Any other thoughts?

It's under Settings>Siri & Search, not under Accessibility.

Assuming that you have an iCloud or iTunes backup of your iPad, while a factory restore is intended to fully erase and reset the device, you won't lose anything.

The reason that you have a backup is to be able to restore your files, photos and other data - and the majority of device settings - should the need arise.

Be aware that unless a Passcode is set, much of your iPad's advanced functionality will be inhibited.

To be absolutely clear...: