Re: I cannot find facebook icon in apps when trying to put it back onto homescreen. What can I do?
Welcome to Android Central! Which phone do you have? Are you sure the actual Facebook app was installed, or were you using the mobile Facebook website? It's possible to create a homescreen shortcut icon for a mobile site, so perhaps you did that and forgot?
First I'm going to assume that you mean that you can't find it in your app drawer, and not you can't find it in Settings under apps. If it is missing from the list of apps in your settings you will have to reinstall it from the Play store. I found on my S10 that if an app is in a folder it will not also be shown in the drawer for some apps and Facebook is one of them. You should have a search bar at the top of your app drawer, click in it and type Facebook if the app is installed on your device it will show there. For me if I touch and hold the app I have the options to open it or locate it. If you use the locate option then you should be able to move it around just like before and add it back to your home screen.