Applications in authentik are the other half of providers. They exist in a 1-to-1 relationship, each application needs a provider and every provider can be used with one application.
Application access can be configured using (Policy) Bindings. Click on an application in the applications list, and select the *Policy / Group / User Bindings* tab. There you can bind users/groups/policies to grant them access. When nothing is bound, everyone has access. You can use this to grant access to one or multiple users/groups, or dynamically give access using policies.
To hide applications without modifying policy settings and without removing it, you can simply set the *Launch URL* to `blank://blank`, which will hide the application from users.
Keep in mind, the users still have access, so they can still authorize access when the login process is started from the application.