I don't know if Telegram can guarantee secure communications and I didn't want to imply that.
But there is not only US.
In Italy basically everything censored on Facebook, YouTube etc propagate with no problem on Telegram.
Content on the origin of the virus in Wuhan lab and gain of function experiments? Telegram.
Info on how to actually treat Covid? Telegram.
Organization of protests against lockdowns and other measures? Telegram.
Doctors warning against the "vaccines"? Telegram.
Adverse reactions? Telegram.
Actual news on Ukraine war? Telegram.
And so on. Telegram has been crucial against the regime. The only channel closed by Telegram has been one inciting people to commit severe illegal acts such as occupy Rome train station; no one knew who run that channel and we always suspected it was the intelligence trying to set traps but no one joined the occupation of the train station or other initiatives proposed by that channel. Then a magistrate from Turin asked Telegram to close it and Telegram accepted with a message by Durov giving explanations.
Ironically the only closed channel was the one working against us and it was probably by the police, lol.