How I did to display it with TMPro.TextMeshProUGUI:
ttx -t cmap Musica.ttf to get the unicode codes in it.
I clicked on
Window > TextMeshPro > Font Asset Creator. Then I added the codes into Font Assert by using Unicode Range (Hex).
After I had added them it turned out the range was:
The characters look very pixly right now but at least they are not empty.
I did not get it working with Text component, maybe someone else can answer how to do that.