HI Madison,
One of the many extremely scary yet frustrating things about our BPD kids is the depression and suicidal ideation.
The great news is your daughter is getting the help now. I am not sure how the DBT program works, but usually don't they recommend therapists and psychiatrist for follow up treatment( assuming you don't already have a therapist for her?). You also stated in your past posts that you were looking into getting therapy for yourself ( good for you!).
So the imperfect, frustrating answer here is (1) If your daughter is younger than 18 , you can talk to her DBT therapists/ program directly and tell them your concerns( I know you mentioned she is a teen in previous posts) .(2) Both of you continuing therapy for yourselves.
Here is a link to suicidal ideation from this forum that may provide some info:
https://bpdfamily.com/message_board/index.php?topic=69192.0Please keep us posted.