Check WhatsApp chat backup in Google Drive or iCloud
Uninstall and reinstall WhatsApp
Verify your phone number during setup
Restore chats from the available backup when prompted
Check local backup files on Android if Google Drive backup is unavailable
Use a file manager to locate WhatsApp database backups on Android
Rename the desired backup file to the current database filename
Reinstall WhatsApp and restore from the local backup
Ask the sender to forward the deleted message again
Check linked devices if the message is still visible there
Use notification history on Android if it was enabled
Use third-party recovery tools only if you trust the source and understand the risks