The Brazilian Internet Law (Marco Civil da Internet) says that the content to be removed via judicial intervention must be specified. It does not allow the blocking of entire accounts from a social media platform. In fact, Brazilian Constitution forbids this kind of censorship (Censura Prévia). The decision to block X nationwide is based on a series of decisions that blatantly violate Brazilian Law.
By the way, the dictator-judge Alexandre de Moraes ordered Starlink’s asset freeze before Starlink wouldn’t comply with X blocking.