Is the wife considered disobedient (nashiz) for not objecting to her husband marrying another woman in exchange for her return to her country and job, especially since she feels no jealousy towards her husband?

It is obligatory for both spouses to treat each other kindly. The wife does not have the right to object to her husband marrying another woman, unless she stipulated this in the marriage contract. In that case, she has the right to annul the marriage. You do not have the right to leave your home and return to your country if your husband marries, because a wife resides where her husband resides; otherwise, she becomes disobedient (nashiz).