When you are configuring federation between two Okta orgs using OpenID Connect:
At the Okta org that represents the Identity Provider, select Applications and then click Add Application.
You need a trusted client, so select Web as the platform. OpenID Connect is the sign-in method by default.
Click Next.
Enter a name for your application.
Leave the default for Login Redirect URI for now. We will come back to it later.
Assign a group or leave the Everyone default. Be sure to verify that the users you want to have access are assigned to the group that you select.
Click Done.
Copy the Client ID and Client Secret from the Client Credentials section and paste into a text editor. You need these when you configure this Identity Provider in your org.