Please explain what exactly you mean by saying "Compose Font" disappear in your menu. Do you mean "Create Outline" is grayed out? A little information should help to understand the issue.
Create Outlines will be available if the type is selected with either the Type tool or the Selection tool.
It will be grayed out if text is not selected, or if the type was already covered to outlines. To see if it was already converted to outlines, look at the Layers panel:
Not converted to outlines:
Converted to outlines: