Are you using the developer console? I think you might have signed up for a developer trial instead of an IT trial.
When you create an application in the developer console, by default, we set the visibility of the app so it doesn’t show in the end-user chiclet page (UserHome). This is the correct default for people doing application development. The common scenario for these applications is for the end-user to log into the application without the okta end-user chiclet page (think consumer apps)
When you are using the IT trial (https://www.okta.com/start-with-okta/) you get OIDC capability geared for the employee use cases. When you create an OIDC app, the visibility is set correctly so it shows up on the end-user chiclet page.
Hope this information helps, if you need more help, can you describe what you are building and who you are building it for?