Indeed crypto community is fond of telegram today. Telegram was launched in 2013 and took a while to become the most preferred medium by the crypto enthusiasts. There's no official telegram channel or group by Satoshi Nakamoto. If you find any it must be a scam.
Well this pretty much explain a lot and end this question,
Satoshi left without a trace back in 2010 so there is no chance that Satoshi could create a Telegram channel or group.
And I don't think that there would be a benefit if there would be one?
I mean we already have this forum so why would we need a telegram group.