This is what I see for the majority of their comments and history. Perhaps you mis-clicked and viewed another user's post history.

https://imgur.com/l1xQHLn.png

https://imgur.com/Wz4Mpw0.png

https://imgur.com/IiIf1cR.png

https://imgur.com/n8oVKYe.png

https://imgur.com/TOmFbwJ.png

https://imgur.com/YOLAxFl.png

https://imgur.com/TW8hz8D.png

Those screenshots are empty. Still waiting for any kind of evidence that that user was "shadowbanned" as you say.