I am seeing conflicting news stories about the upcoming visa changes for April 10, 2024. The Brazil Report states that the requirement might be dropped for U.S. citizens, while VisaGuide states that Brazil is postponing till next year. While the actual e-visa site has not had any updates regarding the date since February 2nd.
https://brazilian.report/liveblog/politics-insider/2024/03/28/lula-to-drop-visa-requirements-us-citizens/
https://visaguide.world/news/brazil-postpones-imposing-visas-for-australians-canadians-americans-until-april-10-2025/