https://olharolimpico.blogosfera.uol.com.br/2019/03/29/sem-lei-piva-esporte-olimpico-deve-sofrer-apagao-a-partir-de-abril/
Basically, it says that because the Brazilian Olympic Committee (COB) has a significant debt with the government, which they can't pay now, no money - at all - will be given to COB anymore. This was done through Lei Piva/Piva Law, which seems to be going to end from April on (or at least until COB works away it's debt).
This way, COB can't divide quite some millions, which they would get via this Lei Piva, to the different federations. I'm taking CBDN (snow sport federation) as example, because that's the one I actually know stuff about, so in their case it mean's that they're gonna depend entirely on the money they get from FIS and IBU, international sports federations. As good as all salaries are paid by this Lei Piva/Piva Law, meaning all money from FIS and IBU would have to be used to pay that...leaving zero money for any infrastructure or any support for athletes. I'm sure the basic workings are similar for most of the other sports federations, except for maybe those that are soo big they don't depend on COB that much.
@vinipereira @thiago_simoes @hoversaBR (and apologies if I'm forgetting a Brazilian), feel free to add or change to this. What I said is mostly a mix of what I read in the article and what I heard from someone who knows the inner workings, but it's possible I got some details wrong or something.