If you want to show your page in the dashboard or left sidebar, Then you have to use Private Route. Because to access your private page, you will need the authentication.

To create a private page or route, At first create a file named CustomApp.js(or in any specific name ) in src->container folder.

Then you have to go at src->container->app->appRouter.js and Then look at the screenshot

For showing it in the sidebar, You have to go at sidebar->option.js .

Then in the dashboard sidebar option, you will see like this