Apple has no interest in your data - in fact the reverse is true; it would not be in Apple’s commercial interest to access your data.
Should you research a little deeper you will discover that Apple’s security measures are so effective that, unless the device is unlocked by the associated Passcode, Apple cannot access locally stored data - and neither can anyone else; various law enforcement agencies that have been similarly unable to retrieve data from Apple devices.
All data locally stored on your iPad is encrypted with encryption keys that are only present on your iPad. Other than you (or someone other than you that has both physical access to the iPad - and knowledge of the Passcode), nobody can access this data. Successful entry of your Passcode unlocks the iPad security chip (the Secure Enclave) - within which is the only copy of the encryption keys that are required to both decrypt and access your data. No Passcode = no encryption keys = no access to data.
Data that you store in iCloud is also encrypted. While it may be technically possible for some of this data to accessed by Apple, the system architecture is contrived to make this extremely difficult. Particularly sensitive data (such as a backup copy of your Keychain) is also end-to-end encrypted using cryptographic keys that are only stored on your physical device(s) - and therefore cannot be accessed by Apple or anyone else.
A full description of Apple’s security measures and architecture are far to complex to describe here. You can, however, review published documentation that fully describes these measures:
Apple Platform Security - Apple Support
