If your deal qualifies for PCN, you're also eligible for Platform Capital Invites. Platform Capital Invites allow you to search through the AngelList LP network of qualified purchasers and clients (high net-worth individuals), and optionally send up to 1k invites to your deal.
In order to send one of these invites, navigate to the Invite tab on the deal dashboard for the deal in question. You'll see a radio button to select "Platform Capital Invites." This allows you to search through the AngelList LP network of qualified purchasers and clients (high net-worth individuals), and optionally send up to 1k invites to your deal.