With the site configuration feature, you can create multiple sites in your portal. But you can only enable a single site at a time. If you Enable one site the other site will be saved as a Draft automatically.
Let’s understand this article more clearly by referring the below-attached image. Here PortalXpand Customer Service site – is saved as a Draft and the PortalXpand site is saved as Published. Now, if we publish the ‘PortalXpand Customer Service’ site then the ‘PortalXPand’ Site will automatically be saved as a draft.
Read this article, to know how you can create multiple sites.