Hi, Angel.
Certainly telling, not asking, your daughter to leave you out of plans or conversations with ex is a reasonable boundary.
Is he trying to work his way back into your life via your daughter?
Who knows?
But you don’t have to participate.
You made a decision sometime back that this person was not good for ypur mental health and serenity.
Okay to stick to it.
If she doesn’t like it, well, that’s unfortunate, but we will all live.
Not your circus, not your monkeys.