I have ADD and ASD but DMT never exacerbated those... I guess these disorders aren't necessarily so derealization nor depersonalization sensitive.
Actually while people with ASD can still become psychotic, it's also considered to often be like doing brain exercises all day long (and may thus prevent early mental degeneration), and I am the type to analyze things a lot and it makes sense this is in part what has helped me to be resilient to insane trips like those from DMT... I think it may help me to avoid getting too lost acutely. Then again after a really mystical mushroom trip I did go through some kind of existential crisis of having to redefine pretty much all my motivations in life consciously and it took me years.
I truly wonder how many people with so-diagnosed personality disorders are actually having some sort of existential crisis that they aren't as able to come out of.