It happened about a few days ago: https://www.reuters.com/legal/trans...aises-doubt-over-fate-10-bln-jets-2022-03-10/
It did not happen. Draft law was introduced. It is different to one being passed and implemented. They are discussing all kinds of crazy response but so far the response was fairly ration in terms of countersanctions. Nationalising leased aircrafts is too crazy and I reckon they will not go down this path but who knows.