Doesn't USA have the tax concept of "transfer pricing"?

Musk (who is definitely the beneficial owner of Twitter and probably of Tesla too) is providing "free" consulting service of Tesla employees for Twitter -> without an invoice and without tax. (or maybe there will be an invoice?)

In EU that should be taxed (and also invoiced) - with similar prices as a consulting provided by a consulting company that does code reviews. The tax office is interested most in the missing tax of course.