Ghost jobs.
Also Impossible jobs. They ask for so much, and set pay for so little compared to what they require, in order that the Americans eith those skills would never apply because the money wasn’t worth what they required. So then the companies could have pretext for h1-b hires, they would simply modify the job skills down, amd also lower the pay, so they could claim they aren’t the same job.
Employers have been doing that for years.
I remember back in the 90s seeing ads for "Senior Engineers" with a PhD, ten years experience with five of that with a very specific skill set. Pay range about the same as a newly graduated engineer with a bachelor's degree. I figured either they had a specific person in mind (boss's son?) or they wanted to hire a foreigner from Asia.