This is such a cool question and it taps into the weird, wonderful way stories evolve. The short, straightforward take I keep telling friends is: Dorothy as a character comes from L. Frank Baum's book 'The Wonderful Wizard of Oz', and Judy Garland made Dorothy iconic in the 1939 film 'The Wizard of Oz'. Anything called 'Finding Dorothy' is usually riffing on that legacy—either on the character, the movie, or the people around the movie—but it's rarely a straight, literal retelling of Judy Garland's life.
I get a little nerdy about distinctions here. There are novels, plays, and films that use 'Finding Dorothy' as a title or theme, and they take different approaches. Some works are explicitly inspired by the making of the 1939 film and the real-life people involved, using elements from Judy Garland's experience as emotional fuel: the pressure of stardom, the film's long shadow, and the ways a single role can define someone. Other pieces are more metaphorical—they use Dorothy as a symbol of searching for home, identity, or courage, and the title becomes a hook rather than a promise of biography. So if you pick up something named 'Finding Dorothy', check whether it calls itself a novel, a fictional imagining, or a documentary. That tells you whether it's leaning on Judy Garland's biographical beats or simply paying homage to the cultural weight she gave the role.
Personally, I love both flavors. A responsible biographical take can reveal how the film changed people's lives and why Garland's Dorothy still resonates. At the same time, creative reinterpretations that wrestle with the idea of 'finding Dorothy'—what it means to find home, innocence, or courage in modern life—can be surprisingly moving. Either way, tracing the connections back to 'The Wizard of Oz' and Judy Garland makes the experience richer, and I always end up watching the ruby slippers scene again after I finish something inspired by that world.