There are a lot of telegram chats about Home Assistant in my native language ( I think that there are several dozens telegram chats about HA in Russian language).
But I don’t know any telegram chat about Home Assistant in English language. The official telegram chat is using Discord service ( https://www.home-assistant.io/join-chat/ ), but I’m not a huge of Discord, I prefer to use telegram.
I have created a new chat in telegram to talk about Home Assistant in English — Telegram: Contact @home_assistant_en If you use telegram you can join it.