What is this top bar on iOS mobile Safari?

I am building a web app and am wondering why this top bar showing my website title and URL are shown at the top of the page on iOS Safari. I do not want this behavior. I don't see this on desktop in fullscreen or smaller windows. I want the webpage to take up the full page on mobile. I have done some research and am aware of iOS PWA but I don't have anything PWA setup in my index.html. I am using Angular if that matters. Thanks.