This is generally not a requirement for an H-1B. https://www.dol.gov/agencies/whd/fact-sheets/62o-h1b-recruit...
At the same time, if a US person applies and is similarly qualified, they must be offered the job.
Which is trivially abuseable by offering substantially less for the H-1B position. I'm not sure if there's an easy policy solution for that.
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This is generally not a requirement for an H-1B. https://www.dol.gov/agencies/whd/fact-sheets/62o-h1b-recruit...