The film 'Below Zero, 2021' does not feature any identifiable LGBTQ+ characters or themes. The storyline centers on a suspenseful action plot involving a prisoner transport, with no elements related to sexual orientation or gender identity being depicted or explored.

Based on the provided details, there is insufficient information to assess the portrayal of transsexual characters or themes in 'Below Zero, 2021'. No specific plot points or character arcs related to transsexual identity were mentioned, preventing an evaluation of its net impact.

The film's primary action sequences and physical confrontations involve male characters. No female character is depicted engaging in or winning close-quarters physical combat against one or more male opponents.

The film "Below Zero" (2021) is an original production with no indicated prior source material, historical figures, or previous installments. Therefore, its characters are new and cannot be considered gender-swapped from an established canon.

The provided details for "Below Zero, 2021" do not include any source material, prior installments, or historical context for its characters. Without a pre-established canonical or historical race for any character, it is impossible to determine if a race swap occurred according to the definition.