If you wish to have WhatsApp automatically create backups of your messages, tap the Back up to Google Drive option. This will present you with an option for how often you would like automatic backups to occur.

Tap Next to continue (if prompted). You’ll then be able to see all of your previous and existing WhatsApp chats. [1] X Research source

Tap Next to continue (if prompted). You’ll then be able to see all of your previous and existing WhatsApp chats. [1] X Research source

Make sure the new iPhone is logged into the same Apple ID as your old iPhone. If you’re already signed in on your new iPhone, skip this step.