Without any information regarding the plot, characters, or themes of 'Her Sturdy Oak,' it is not possible to evaluate its portrayal of LGBTQ+ elements. Therefore, no depiction can be identified.

The film "Her Sturdy Oak" (1921) features a female character who cross-dresses as a boy for disguise to save her family's business. This narrative element is a plot device of temporary cross-dressing and does not involve themes or characters identifiable as transsexual. Therefore, there is no transsexual portrayal to evaluate.

The movie does not contain any action or adventure elements.

No prior source material or historical context is provided for "Her Sturdy Oak" (1921) that establishes canonical genders for its characters before this film. Without a pre-existing baseline, it is not possible for any character to have undergone a gender swap.

There is no evidence that "Her Sturdy Oak" (1921), an adaptation of a short story, features characters whose race was canonically or widely established in prior source material or history, and then portrayed as a different race in the film.