Brazil put to the 2020 plenary that due to the COVID-19 situation it was really impossible to predict if people would be able to travel in june 2021.
They would prefer to postpone to April 2022 because it was much more likely that everyone would be able to attend the championships.
This proposal was approved by a vote in the plenary.
Brazil had anounced the exact 2022 date as 20. - 30. April. Venue, rules Etc. will stay as already published.