China pretty much owns the dollar at this point with the amount of debt the U.S. is in.
Myth. China has never owned more than ~10% of US debt, and it's currently ~5%.
It's the same as with the trade deficit. It's not really about that. It's about the U.S.' envy with China's technological progress that is now able to provide the world with the wireless infrastructure of the future that the U.S. doesn't really have an alternative for.
5G does not a civilisation make.
How much does China actually make that the USA / EU / Japan etc. can't do as as well or better? Actually, very little. Remember, vast amounts of important stuff that China is making is IP designed and owned by Western companies. The West could hardly stop importing from China overnight, but production could be moved away over a course of a few years.
And, no, there is just about no chance the USA or most of the EU will permit China ownership of vital infrastructure.
But China is not the West with it's imperialistic tendencies. It just accepts the world as is but won't allow trade partners or adversaries to turn against it. The country also won't allow dissidence in Taiwan
I'd have a stop and think about the contradictions in there...
...but at the same time it's unlikely to violently suppress it...
Like it hasn't violently suppressed Tibet, or the Uighurs, or unilaterally claimed the South China Sea (which it's covered in military bases, right off the coasts of several other nations) and Senkaku islands, and invaded India over specious border claims? And if you've missed all the overt military posturing China makes towards Taiwan, well you need to do some checking. You are however right that it is unlikely to militarily attack it soon: but mostly because it doesn't think it would be able to win and get away with it.
And China does not have imperialist tendencies but will export it's political system to countries that are vulnerable to it and have populist leadership like Hungary.
Again, you need to think really carefully about what you're arguing here. Imperialism in terms of invading places and permanently occupying them is relatively old hat for everyone these days. Economic and political domination has been the new imperialism for a long time now, and China's getting right up there. China's abilities to influence the world have been limited by underdevelopment for decades. As its growth and development progress and these barriers increasingly fall away, China is going to assert itself steadily more. We'd be fools to think it's going to sit on all that power and not use it.