Based on the provided information, the film does not feature any identifiable LGBTQ+ characters or themes. Consequently, an evaluation of its LGBTQ+ portrayal cannot be made.

The film 'A Fighting Heart' (1924) is a silent drama whose plot and character descriptions do not contain any identifiable transsexual characters or themes. Consequently, the film offers no portrayal, positive, negative, or neutral, regarding transsexual identity.

The film centers on Micky, a female boxer. While she engages in direct physical combat, her competitive matches are exclusively against other female boxers. There are no depicted scenes where Micky or any other female character defeats one or more male opponents in close-quarters physical combat.

The film "A Fighting Heart" (1924) is an original silent drama. There is no evidence of pre-existing source material or established characters whose genders could have been altered in this adaptation.

The 1924 film "A Fighting Heart" is an adaptation of a story by Max Brand. There is no evidence that any character was canonically or widely established as one race and then portrayed as a different race in this silent film adaptation. The cast members were all white, consistent with the likely racial depiction of the characters in the source material and the film's era.