
Encryption?
Telegram basically isn't encrypted. It's "cloud-based" unless you explicitly tell it not to be, i.e. a private chat between exactly two devices. It's always cloud-based for channels. Any "cloud-based" encryption they talk about (contacts, IP addresses, messages, images, anything else they can get from you) isn't end to end- it's decrypted at the closed-source server and re-encrypted there. The company hosts servers in a lot of jurisdictions. Conveniently this means governments can snoop at will with court orders or otherwise.
Then there's the thing where if you can control someone's SMS, you can get into their Telegram account. Pro tip: any government can do this. And an awful lot of other people besides. It's called SIM-swapping and is used in bulk for stolen credentials bank fraud.
Telegram's response to this is "oh you gotta click the private button and turn on two-factor auth". Their idea of two factor auth is sms and a password. And this article clearly indicates that most people don't realise these things and don't do either of them anyway.
Telegram is no longer threatened by governments because governments no longer need to threaten them. They no longer talk about encryption because everyone already thinks it's secure.