iOS 14 - Application does not have an entry in the device settings
Normally you can get the apps to appear by simply quitting and reopening the Settings app.
On the iPad Air you can do that by double-clicking the Home button to get the app switch. Swipe upwards on the Settings app in order to quit it.
After opening the Settings app again, the list should be refreshed.
If this doesn't help, ensure that you can actually start the apps in question. I.e. tap them to run them.