I merely mentioned fontawesome as one of many possible examples. And as already said, a symbol having its place in unicode does not mean it is available on the computer or in a certain program. For example, in Linux terminals it's not uncommon that at least one optional font installation is required in order to get various emoji to display correctly, let alone other non-western symbols.

Many people use the terminal exactly because it displays fewer kinds of content than e.g. a web browser, which as a side effect simplifies many situations.