Having their current girl bug you with their problem while you are trying to heal and forget the experience with your ex, can mess you up.

The best thing you can do for their current partner is to tell them you are still healing and you don't want anything to do with conversations about your ex. Your healing should be as important as your sanity.

If they are reaching out to you, it's because they are already experiencing trauma so speaking with you should be for advice on how to leave. If they are seeking advice on how to cope, then avoid them as much as possible.