Restore from an iCloud backup that includes the deleted messages
Delete WhatsApp from the iPhone
Reinstall WhatsApp from the App Store
Verify the same phone number
Tap Restore Chat History when prompted
Restore from an iPhone backup made in Finder or iTunes
Connect the iPhone to the computer used for backup
Open Finder on Mac or iTunes on Windows
Select the iPhone and choose Restore Backup
Use a third-party iPhone data recovery tool
Scan the iPhone or an existing backup for WhatsApp data
Recover messages if the tool finds them
Ask the other person in the chat to forward or export the messages
Check whether the messages are still visible on another linked device
Confirm that WhatsApp iCloud backup was enabled before deletion
Check the last backup date before restoring
Avoid overwriting the current data before attempting recovery