Is leaving work to return to one's family out of a desire to supervise and educate them considered a severance of one's livelihood?

Seeking provision is sometimes obligatory and sometimes permissible, depending on the expenses one is responsible for. Since you have sufficient income for yourself and your dependents in your country, and your children need you for their upbringing and care, the benefit of raising children takes precedence over acquiring additional wealth. The Prophet, peace and blessings be upon him, said: "All of you are shepherds, and all of you are responsible for your flock." The father's presence among his children ensures their complete care, and the wife has a right to her husband's presence with her. Therefore, the questioner is advised to return to his family and remain close to them, especially in these times when tribulations have become widespread.