I don't think your idea is too far out.
If it were true, I wouldn't be the least surprised.
But consider this - it might be absolutely fair.
For the same reason you cannot have 'free trade' between a 'state actor' and an 'open economy'. Can't work due to dumping, strategic investments, etc. etc..
So if China wants to play huge strategic games and control their economy, keep wages low, keep people utterly in the dark and under their control - for the purposes of taking away major industrial sectors to the US ... then it would be 100% fair game for the US to intervene. I don't even think they'd have to do it covertly.
I believe that there should be an x% tarrif from any nation that is not 'free market'. And then a y% tariff if they are externalizing things like pollution and human rights. After all, if China has only a 50% wage advantage due to overtly oppressed wages, then how can anyone compete? And then a z% tariff for currency manipulation.
'Tit for tat trade' is the best policy and I think that would be a great approach to China: when they enact pollution laws that are consistent with ours, then that tariff gets reduced. When they get rid of currency flow controls and allow money to cross the border as happens here, then no more %z tariff.
The truly bizarre thing about this scenario is that this is a surprise to anyone. Of course 'supply chains are infiltrated'. This is 100% happening, we know this, because 'we' i.e. Western powers do it. For gosh sakes. Given the super aggressive policies that China has going on right now - even trying to recruit and pressure ex-pat students, their 100% control of information etc. ... it should be of no surprise to anyone that they are up to this.
Even Canadian PM Trudeau, kind of the 'opposite of Trump' and actively trying to get along in China has recently banned some Chinese investment and activity by mobile phone manufacturers.
I think that any major company should probably be inspecting all hardware that comes in, and I don't doubt that this is going to be 'the new normal'.
I hope it's all just a bad story but my bet is that it leans towards the truth, and there is probably some funny business going on as well.