Just like you, in the US, here in Brazil we're also getting our own affiliation shakeups:
In Presidente Prudente, São Paulo, TV Fronteira was stripped of its TV Globo affiliation, after its owner used the station for his own benefit, during his (eventually failed) campaign for mayor of that city, which went against Globo rules (and even some legal and regulatory issues, but that's a different story). After that, TV Fronteira went independent and TV TEM, a TV Globo affiliate based in Bauru, around 270km/168mi away, started covering the area through re-transmitters (and local news coverage was severely affected, since the translators only replicate the feed from Bauru, and reports from Prudente, which were added with the station's coverage area expansion, are very limited).
The moment TV Fronteira stopped broadcasting TV Globo:
On the first weekday after the affiliation switch, TV TEM's midday newscast had its first block simulcast across all the group's stations, covering 60% of São Paulo state:
TV Fronteira's first evening newscast as an independent station:
Also losing TV Globo affiliation, after a long legal battle, is TV Gazeta, in the state of Alagoas, owned by Organização Arnon de Mello, which has among its owners former Brazilian president and currently senator Fernando Collor de Mello. TV Asa Branca, based in Caruaru, Pernambuco, took over the affiliation, through a new, full-powered station in Maceió, and the local news operation is expected to start this Wednesday (October 1st) - until then, the new station is simulcasting TV Globo Nordeste, the network's O&O station in the Recife/Olinda area, also in Pernambuco.
https://g1.globo.com/pe/caruaru-regiao/noticia/2025/09/27/globo-inicia-transmissao-em-alagoas-pela-tv-asa-branca.ghtml
https://noticiasdatv.uol.com.br/noticia/televisao/apos-piratear-atracoes-da-globo-em-alagoas-tv-de-collor-decide-obedecer-stf-141993
The last time TV Globo was involved in such major affiliation switches was back in 2008, when TV Leste, their then-affiliate in Governador Valadares, Minas Gerais, refused to sell out to Rede Inter TV (which owns TV Globo affiliates in three states - Rio de Janeiro, Minas Gerais and Rio Grande do Norte) and decided to join the RECORD (their name is in all-caps now) network. TV dos Vales (based in Coronel Fabriciano, 115km/71mi away), the RECORD affiliate covering the area, and just one year old at the time, switched to TV Globo and was eventually sold to Inter TV, becoming Inter TV dos Vales.