Are you searching instagram restrict vs block, by blocking someone, you can prevent them from accessing your Instagram profile. It will not be discovered even if people search for it. They will learn that you have blocked them since they are unable to view your posts, Stories, or profile information. But the restriction is a form of blocking.
They are able to view your profile and posts if you restrict them. But you won't receive their messages, calls, comments, or other notifications. The user will continue to browse and comment on your posts without ever being aware of this.