There are many American Internet/Software products in China.Part of why this has been unsatisfying is that China has no avenue for symmetric retaliation and measured escalation. It already ran all the American internet companies out of China long ago, and it's hardly like there are any Indian tech companies in China it can squeeze. The best thing you can do in a situation like this is cut your losses, which is what China is doing with TikTok. To do otherwise, to yell and beat your chest and make a scene to distract others - and yourself most of all - from your loss is very... Indian.
Which is why I also ask that my compatriots here keep this issue in perspective. Yes, China will have to just take an L on TikTok, sucks but that's just life sometimes. Panicking and ranting about how unfair this is isn't going to accomplish anything other than making you look weak and rattled.
Google Chrome remains a popular browser. There is no way a Chinese browser would be allowed to be so popular in the US, and Google derives tremendous benefit from its browser market share, so China could act against it and invest to improve the UC Browser or QQ Browser. UC Browser was recently banned in India so it would be great to see some support flow their way. The problem is it's already gotten a bad reputation due to security issues in the past.
Microsoft Windows is still widely used in China. Although some alternatives are being worked on, China is still way too dependent on Windows. This is actually a national security issue as Windows almost certainly has NSA backdoors in it. There should be more efforts to move away from Windows.
Apple of course has a presence in China, although that is partially mitigated due to them also having manufacturing there, as well as their market share being relatively low. I don't think retaliating against them would be the best move. Having a non-Chinese competitor in the market will keep competitive pressures in the market whilst not taking too much market share is an ideal situation.
Finally, while China has Baidu as a domestic search engine, it still does not have a good offering in the International Search Market. It would be impossible for the West to ban a good Chinese Search offering since it would be a website that can be accessed through the world wide web URL. While a Chinese Search engine is not likely to become dominant, any international market share China can take away from companies like Google that answer the US would be a good thing. Russia has Yandex search and many European countries have their own internationally available search offerings.