The Verdict: Need More Info
You can apply once your pension is in payment. Before then, check that it will reach US$2,000 a month and that your scheme will pay it to someone living in Brazil.
The application shows the pension and your ability to transfer the money, so it cannot be made on a pension that has not started. Other regular income can top it up.
This route has no dependant allowance: a spouse or children apply separately under family reunion. If you want to be in Brazil sooner, the digital nomad route asks for US$1,500 a month from foreign clients.