How to see deleted WhatsApp messages on iPhone
For iPhone, iCloud is the only method to view deleted WhatsApp messages. As long as the message is backed up on Apple’s cloud service, it can be restored and viewed post deletion as well.
Delete or uninstall WhatsApp from your iPhone and re-install it from the App Store
– Now, open WhatsApp and restore the old backup from iCloud
– Once the backup is fully restored, you can view the deleted messages in the concerned chats.