There's a difference between China banning Google from operating in China, and China sanctioning Google. The latter would prevent any company that does business

There's a difference between China banning Google from operating in China, and China sanctioning Google. The latter would prevent any company that does business in China from doing business with Google, effectively cutting Google off from most major companies in the world. This is what the US did to Huawei. Huawei was already effectively banned from selling in the US market, and it didn't impact them that badly. They could still sell in China, Europe, India, Africa, etc. But being sanctioned by the US meant that they couldn't buy from critical suppliers, meaning they wouldn't even be able to manufacture their products in the first place. The reason why China hasn't retaliated against a company like Apple, which would be devastated by any Chinese sanctions, is that long term, such a move would scare off other companies. Everyone would try to limit their supply-chain exposure to China, just as Chinese companies are now trying to do with the US.