As per cheatsheet the special char code for "map-marker-alt " is  but the output is obtained by using  which belongs to map-marker. · Issue #16152 · FortAwesome/Font-Awesome · GitHub
File:Map marker font awesome.svg - Wikimedia Commons
FontIcon not working in ActionItem · Issue #1483 · NativeScript/nativescript-angular · GitHub
Location Dot Icon | Font Awesome
As per cheatsheet the special char code for "map-marker-alt " is  but the output is obtained by using  which belongs to map-marker. · Issue #16152 · FortAwesome/Font-Awesome · GitHub