Due to the absence of plot details or character information in the provided input, it is not possible to assess the portrayal of LGBTQ+ characters or themes in 'Life in a Day 2020, 2021'. Therefore, a definitive evaluation cannot be made.

There is insufficient information available to assess the film's portrayal of transsexual characters or themes. The provided details do not indicate whether such depictions exist, making it impossible to determine a net impact or provide a character arc example.

The movie does not contain any action or adventure elements.

Life in a Day 2020, 2021 is a documentary compiling user-submitted footage from a single day. It features real individuals, not fictional or historical characters with pre-established canonical genders that could be swapped.

This film is a crowdsourced documentary featuring real people from around the world, not fictional characters or historical figures with pre-established racial identities. Therefore, the concept of a 'race swap' does not apply.