Due to the absence of specific information regarding LGBTQ+ characters or themes in the provided movie details and web search results for 'Mystery Road, 2018', a comprehensive assessment of its portrayal of the LGBTQ+ community cannot be made. Therefore, the net impact remains unknown.

There is not enough information available to assess the portrayal of transsexual characters or themes in 'Mystery Road, 2018'. No details regarding such depictions were provided, preventing an evaluation of their presence or impact.

The movie does not contain any action or adventure elements.

Without information on source material, previous installments, or historical figures related to 'Mystery Road, 2018', it is impossible to determine if any character's on-screen gender differs from a prior established canon.

The series 'Mystery Road' (2018) is a prequel within an existing franchise. The lead character, Jay Swan, is consistently portrayed by an Indigenous Australian actor, Aaron Pedersen, aligning with the character's established race across all installments. There is no evidence of any character being depicted as a different race from their canonical or historical establishment.