Hey kp.hardeman,
If you are having trouble restoring an iCloud backup to WhatsApp, these articles from WhatsApp Help Center may be able to help.
"Restore your chat history from an iCloud backup
- Verify that an iCloud backup exists in WhatsApp > Settings > Chats > Chat Backup.
- If you can see when the last backup was performed, delete and reinstall WhatsApp.
- After verifying your phone number, follow the prompts to restore your chat history."
How to restore your chat history | WhatsApp Help Center
If you cannot restore an iCloud backup, this article may be able to help.
"If you're unable to restore an iCloud backup:
- Verify you're attempting to restore data from the same phone number and iCloud account that the backup was created on.
- If you’re restoring an end-to-end encrypted backup, you’re using the correct password or key.
- Verify there's enough space on your iPhone to restore the backup. You need to have at least 2.05 times the space available in your iCloud account and on your phone than the actual size of your backup.
- If the backup was created using iCloud Drive, you’ll only be able to restore that backup on an iPhone with iOS 12 or newer.
- If you've turned on iCloud Drive for any device using your Apple ID, you won't be able to restore data on your iPhone unless it has iOS 12 or newer.
- Attempt the restoration from a different network. Preferably the network you connect to the most.
- Turn iCloud Drive off and back on. Go to iPhone Settings > tap your name > iCloud > turn iCloud Drive off and on.
- Sign out of iCloud and restart your iPhone by turning it off and on. Then, sign back in to iCloud and try the restore again."
Can’t create or restore an iCloud backup | WhatsApp Help Center
If you need more information about how to use WhatsApp, you need to contact the app developer.
How to contact an app developer - Apple Support
Thank you for using Apple Support Communities. Have a good one.