If you are observing your kids and are finding them healthy so far, that's great.
They may have won the "genetic lotery" and may turn out fine.
You now know what behaviors to watch for, so if you start observing any in your children in the future, you will know what tools you need to use with them, and hopefully get them into the right kind of therapy... .
In the meantime, they may need your support in dealing with your ex-wife's unhealthy behaviors in order to develop and mature in a healthy way - a good, strong father that can validate his children's experience and teach them the needed tools can be a big difference in their lives.
Fostering a healthy love for their mother without accepting her dysfunctional behaviors is key. They need to learn what healthy behaviors are and how to effectively protect themselves from the unhealthy behaviors of their mom. You and/or a therapist can be of great help in this... .