Hi DaisyDoo72,
Welcome and hello
You have your hands full with a baby/toddler on top of the strife that goes with a BPD ex.
I can see why you are concerned about the relationship between your daughter and her dad, and it says a lot about you that you want them to bond and have a good relationship.
Sometimes, the best we can do is to help our kids grow up to be emotionally resilient, and to learn how to have good boundaries with a parent who has none, or who has affect instability and confusing behaviors.
Your daughter is so lucky that you are reaching out for support now, while she's still young, especially in her tender years. It does seem like we have to parent in a non-intuitive way when there is a BPD parent in the picture.
How often does your ex see his daughter? Do you have a custody agreement?
Glad you're here
These are tough relationships to go alone.
LnL