This also happened to me in march 2021 on a channel with almost no videos and no activity at all "We have reviewed your content and found severe or repeated vio

This also happened to me in march 2021 on a channel with almost no videos and no activity at all "We have reviewed your content and found severe or repeated violations of our Community Guidelines. Because of this, we have removed your channel from YouTube.". Got another email later the same day from YouTube: "We're pleased to let you know that we've recently reviewed your YouTube account and, after taking another look, we can confirm that it is not in violation of our Terms of Service. We have lifted the suspension of your account, and it is once again active and operational." Must have been an error or glitch, I did not take any action. Maybe the same for you.