What are the cases of such events?

A few high-profile examples:

https://en.wikipedia.org/wiki/List_of_websites_blocked_in_ma...

You can also pick one, and check with a tool like this:

https://www.comparitech.com/privacy-security-tools/blockedin...

None of these are banned. They simply choose to not operate in China, because the laws require them hand over user data. So they choose to monopolize those data themselves, which is allowed in US and so called "free" nations. Go figure how ridiculous that is.

Yes, some of those are banned. Banned means to prohibit, especially by legal means. These websites are not reachable from mainland China, so they are banned in mainland China.

Their operation wasn't suspended for a compliance reason. This article lists some of those, and their (suspected) reason for the ban:

https://www.businessinsider.com/major-us-tech-companies-bloc...

Then there are a lot of Chinese companies are banned from US market.

What's your point?

The point is there is no moral high ground in economic competition.

How many Google businesses operate in China?

Banned in china: Google Gmail Google Play Google Maps Google Drive Google News Facebook Facebook Messenger Instagram Twitter Reddit Tumblr Pinterest WhatsApp Snapchat Slack Viber Line Discord Telegram Signal Wikipedia Dropbox OneDrive Blogger WordPress Medium Quora BBC The New York Times The Guardian The Washington Post Daily Mail CBC (Canada) ABC (Australia) Spotify SoundCloud Amazon Music Pandora Tinder Pornhub XVideos Chaturbate Twitch PlayStation Coinbase Binance

Plus NDR (Norddeutscher Rundfunk) the most absurd one I've found so far.