Identity is self. Some people assign a gender term to it, but that can be like an anchor at times.
Gender roles are the expressions that society imposes on those who wander away from the stereotypical looks of that society.
Like looking like a cowboy in cowboy country... Either male or female, it's a role expression of identity, not the identity of self.
If you don't have a self image of either the stereotypical male or female, then use whatever role feels comfortable.
Or make your own role by just being yourself. Not everyone has or needs a use for having an expression of a role.
Some jobs require a certain amount so they are recognizable to those who may need them, Police, Nurses, etc...
But even within those expressions of those roles, you can usually incorporate a certain amount of your individual identity into them.
Nobody can tell you what your identity is, only you can. That part of you that is self.
Gender is pretty much like all of that. Some people need a role expression to complete their identity, others, not so much.
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