Suitable for any gender in a any biology and identification. You can be a female that wants to be more feminine or a male that wants to be more like a woman. It doesn’t matter. This can include hormone changes, body changes, or simply changes of the mind.
You can have two different types of feminization — in the mind only (privately), or in the body and mind. Call it whatever you like — transgender, sissy, sissification, MtF, or even forced femme.