Bigender isn't DID
I dont know who needs to hear this but people who aren't trans keep misunderstanding bigender as being two people.
Would you say a bisexual person is two people one gay one straight? Of course not
This is actually very harmful as its associating queer gender or sexuality as synonymous with mental illness, something heavily pushed as a hateful ideology by bigots and phobes. Don't give them an inch.
We're normal human variation. Not confused or mentally ill, by token of being bigender.
We have been recognised and recorded for literal centuries.
Some people are queer. It's normal.