Welcome to the forum. If Facebook is still installed just touch and hold the icon, then move it to whichever screen you want. If its not on a home screen have you looked in your phone's app drawer? If its not installed, then go to Play and download and install it.
If you need additional help or have more questions or details to share, please join the site so you can reply in this thread. See this link for instructions on how to join Android Central.
https://forums.androidcentral.com/as...community.html
