Why is that?
The US is led mainly by lawyers, where facts are debatable, whereas most of China's leaders are STEM graduates.
Thus China has constructed around 50 new cities and airports in the past couple of decades, while the US literally can't dig a tunnel from one side of Central Expressway in Mountain View or Palo Alto to the other.
The most egregious failure of US leadership is the corona virus crisis in hospitals. But you could say the same about infrastructure, or just about any other public policy.
And since you said "any other public policy", I have to say I'd easily trade 50 tunnels and airports for access to Wikipedia.
Europe's overly strict rules on "state aid" (giving public money to fund private sector work) mean that large, publicly traded telecoms companies are outsourcing their own R&D out to China, simply to save money. Few people realise, but that's where Nokia and Ericsson do a lot of their 5G R&D, and this can be verified with a quick dig around jobs and LinkedIn etc.
Huawei is the recipient of large quantities of state aid domestically, as well as the beneficiary of inter-governnental loans from the Chinese government to other countries for the purpose of building a mobile network!
https://www.wsj.com/articles/how-the-journal-calculated-huaw...
In terms of the USA, they don't have a significant notional domestic player in base stations - if we consider significant players as being Nokia, Ericsson and Huawei, and consider the former 2 as being mostly European.
The obvious existing networking business to enter from the US perspective would be Cisco, and they weren't interested in this kind of low margin stuff (which says a lot about their other pricing!)
https://www.ft.com/content/536d28c8-4e87-11ea-95a0-43d18ec71... (soft paywall, access via Google referrer)