I'm pretty sure the person you are replying to was being sarcastic, "he's so silenced that he can tell you about it".

You don’t have to believe him; it’s clear on the face of it. Trump often spoke directly to the voters on Twitter and Youtube. That’s gone now.

Trump can still speak directly to the voters who are interested. It turns out not very many are interested. E.g.: https://www.cnbc.com/2021/06/02/trump-blog-page-shuts-down-f...

Even Fox has stopped running his events: https://deadline.com/2021/06/donald-trump-rally-networks-ski...

The largest pro-Trump network has seen major declines in ratings: https://www.thewrap.com/newsmax-fox-news-six-months-ratings/

It’s much harder now because he’s been effectively banned from every relevant “public square”.

That is a fascinating nationalization of private space that did not exist 15 years ago. Was every politician prior to Twitter's ascendance effectively banned from communicating with the public?