Coparenting/blended family

Looking to connect and hear any other moms that have kids from previous relationships and how they’ve dealt with coparenting/sharing children getting into a new relationship or marriage and having to move because of his career? Are the kids with you and moving or have you left them with your ex and moved away? How do you share the kids? How you feel it’s impacted them growing up? Or if you came to that situation with a new partner and decided to call off the relationship/marriage to stay with your kids?