Want to restore my WhatsApp with my backup in my icloud

Your iPhone does not store your chat history in the iCloud Backup. WhatsApp has their own process to backup your WhatsApp data and also restoring your WhatsApp chats from iCloud. If you have not previously backed up your chats using that WhatsApp process, then you will have nothing to restore.

https://faq.whatsapp.com/618575946635920/?cms_platform=iphone&helpref=platform_switcher

You will need your WhatsApp password to get any of your data.

https://faq.whatsapp.com/639067727894647/?cms_platform=iphone&helpref=platform_switcher

This may help --> https://faq.whatsapp.com/618575946635920/?cms_platform=iphone&helpref=platform_switcher&locale=en_US

"To restore your chat history, including your group chats, first make sure you have an existing iCloud backup. Learn how to create one here.

To restore your chat history:

1. Uninstall and reinstall WhatsApp.
2. Verify your phone number and Apple ID.
3. Tap Restore Chat History.

For additional security, you may be prompted to verify your identity to restore your chats. You can do this by receiving a code by text or a call if you haven’t enabled two-step verification or end-to-end encrypted backups. Learn how to turn on two-step verification here and enable end-to-end encrypted backups here.

Note:

• Unfortunately, we can't help restore your backup because your chat history isn’t stored on our servers.
• Any messages sent and received after the latest backup can’t be restored.
• There must be enough free space on both your iCloud and iPhone to restore your chat history. A partial backup can occur if your iPhone does not have enough storage. If you are unable to restore a backup completely, first make sure your device has enough storage, then delete the app and try to restore your backup again. 
• The phone number used for backing up and the one used for restoring must be the same.
• Videos will only be restored if you toggled on Include videos before creating your latest backup.
• Backups include messages and media sent and received in communities. They also include updates shared over WhatsApp Channels, but they do not include media unless you are the channel admin.

Related resources

• How to back up your chat history
• Can’t back up or restore your chat history"

WhatsApp is not an Apple product. Contact the app developer here --> App Support or WhatsApp FAQ  Or Restoring your chat history - WhatsApp FAQ or Contact WhatsApp

WhatsApp Business is not an Apple product. Contact the app developer here --> Developer Website  or App Support  or WhatsApp business products - WhatsApp FAQ