"Question Library is only accessible under the ""My Surveys"" folder (system default folder). You would need to have atleast one survey in ""My Surveys"" folder to have the icon displayed. If you do not have any survey in the ""My Surveys"" folder then please create a test survey and icon should be visible now at the right bottom of the screen.
Screenshot: https://app.screencast.com/wfeDkfSgBr5TG
How do I delete questions from my Question Library?