Site part not appearing on log in page
Deselect brands and regions associated with the site part.
It's possible that your team may want to include a custom piece of messaging on the CampaignDrive homepage of your platform, like detailed instructions on how they should log in or request an account. See the example below:

Site parts for the login page are set up the same way as site parts destined to exist in the platform, except for one key difference.
In order for a site part to display on the login page, the site part must not have any brands or regions assigned to it. This is because a user is not associated with a brand or region until they log into CampaignDrive.