US export controls prevent companies from selling controlled tech. If US companies tried o circumvent then they would absolutely be denied, if they did secretly anyway, against, the law of course they'll likely have passport surrendered, i.e. exit ban if flight risk.

Like this isn't complicated, the difference is Manus was full blown retarded enough to transparently circumvent PRC export controls after PRC closed loopholes and politely signalled them to stop, which they didn't, i.e. they broke actual export control laws. Like Manus didn't try to sell, they fucking sold, sign and dotted, despite being told not to, because its against export control laws.

Even US companies rarely this blatantly dense. Americans getting exit banned for selling controlled hardware is LESS serious then what Manus tried to do, i.e. lesser (relative) export control crimes in US getting same treatment.