Telegram is currently barred in Brazil due to lack of understanding of end-to-end encryption. According to the PF, Telegram did not deliver user data.
The truth is that they are using the excuse of combating attacks on schools to obtain user data and possible criminalization of free expression and question political opponents.
https://gazetabrasil.com.br/justica/2023/04/26/justica-determina-suspensao-do-telegram-no-brasil/