CAUTION
It appears that there may be a site trying to pass itself off as the official Sydney Powell site on Telegram. It's very subtle, but take a very careful look at the last character. You can see it better on the Telegram site where it shows the ID with the @.
https://t.me/s/SidneyPowelI
This one has a creation date of January 13.
https://t.me/s/SidneyPowell
This one has a creation date of November 30, 2020.
I believe the second one is the correct one.