I'm not sure, but it doesn't sound like this event has been accredited by the Mundiale in BsAs?
I did a little online research. This is not disagreeing but hopefully clarifying. Here are the rules and a wiki page:
https://tangoba.org/wp-content/uploads/2025/07/2025-WORLD-DANCE-CHAMPIONSHIP-RULES-AND-REGULATIONS-ENG.pdf
World tango dance tournament - Wikipedia
I didn't see anything on pre-competition events being accredited (however, there is language on the competitors themselves being accredited as part of being accepted, including video in some cases). There is a special class of pre-competition, however, where the winners skip the beginning rounds and go straight to final rounds in the Mundial. From the wiki page:
The World Cup competition is the final leg of a series of pre-competitions held around the world starting from March. Traditionally the city of Buenos Aires and various municipalities choose their own "Municipal" champions who get wildcards into the final rounds. The same wildcard advantage is also given to national or regional champions of recognized competitions; These include Uruguay (UY), Chile (Cali, CL), Colombia (Bogota, CO), Brazil (Rio de Janeiro, BR), USA (San Francisco, US), Russia (Moscow, RU), China (Nanjing, CN), Japan (Tokyo, JP), Korea (Seoul, KR), France (Paris, FR), United Kingdom (London, UK), EU (Campeonato Europeo, Italy).
New municipalities in 2016: Turkey and the region (Istanbul, TR).
So my understanding is for anything that is not the San Francisco event in the USA, applicants need to be accredited (might need video), enter at a lower level, and have to do more rounds to win.