Maybe an unpopular opinion, but the challenge with DID is that there's no empirical evidence supporting it; something like 10-15% of cases are believed to be fictitious, and there's studies that cast doubt on its diagnostic criteria [1]. Around half of clinical psychologists are skeptical as to whether it's 'real', or if it could be better explained by borderline personality disorder or other diagnoses.

[1] https://news.harvard.edu/gazette/story/2012/08/a-story-that-...