We in exUSSR asked similar question - we have huge number of engineers, but don't see huge industrial export, only agricultural now.
Answer found in economy works of Adam Smith and modern - Daron Acemoğlu, James A. Robinson.
Answer is simple and named information inequality.
What it mean - professional know magnitudes more than customer, and customer just don't know 99% of what exist on market, or even more.
To solve problem of information inequality appear middleman, usually in form of entrepreneur, who know customer needs and know what could do professionals, and invest in products (or in services).
Problem is that entrepreneur must have computer education, and at same time be old enough to talk with all people.
In China was so pure people before 2000s, they just don't know computers at all. After middle 2000s China become much richer, they even got about 60 millions more or less similar to middle class of Europe, from which about 7m programmers.
What all these means? Few things.
First - Chinese programmers are now busy in just filling emptiness, as they are culturally so different from West, that many Western soft is not fit, so Chinese programmers need to make their local clones, and they now repeat steps, Western programmers made in 1950s..2000s, so 50 years. Oh, sorry, really computer revolution at West happen in late 1970s, with microcomputers, but anyway, at West we have programmers nearly all ages from school to about 80years old (2020-1980+30..40), but in China, most just about 40 years at most (2020-2005+20).
Second - Chinese programmers don't have enough entrepreneurs, so they cannot got contact with clients, this is like huge concrete wall.
Third, really First - Chinese population older than about 40 years, just don't have any feelings to computers. Believe me, I know lot of people for which virtual world is just don't exists, so Chinese programmers just don't have any feedback from their population, and so they cannot use their home country as foundation to grow. This is so serious obstacle, which just made literally impossible creation of something really interesting but not tied to huge corporation, and China don't have startup ecosystem, because it need decades to grow.
So from all these points for me obvious, we could only see from China only big corporation products with Chinese specifics, and all known examples show this: few games, clone of internet search engine, clone of linux and lot of nearly unknown embedded software in Chinese products.
In about 20 years things could change, if China will open culturally to West, but now they filling gap.