From a legislative perspective, the only criterion that determines the high qualification of a foreign specialist is the amount of their salary (remuneration). As of March 1, 2024, this amount will be equal to 750,000 rubles per quarter (which is 250,000 rubles per month).
One can argue about the objectivity of this criterion, but in most cases, the rate of wages and salaries does correlate with the skill level of a specialist, their knowledge, experience, and capabilities.
It is important to note that in most cases, this criterion allows you to not provide documents of education for this status, confirm working experience, etc. This definitely simplifies the task, given that the competence of a specialist cannot always be confirmed by a field-oriented diploma of education.