Restore iPad app
Accidentally deleted Goodreader and related data. Fortunately, it was backed up to iCloud. How do I restore the data to my iPad?
iPad Air 3, iPadOS 14
Reinstall the App from the App Store. If necessary, restore your iCloud/iTunes backup.
Be aware that restoring data from backup is all or nothing. You cannot selectively restore:
Restore your iPhone, iPad, or iPod touch from a backup - Apple Support