So deeply sorry for your daughters loss, and the pain you feel. My daughter lost her 1st pregnancy at 13 weeks. I have had 4 losses myself. She found out on the dating scan.
The first month was horrific. She was actually suicidal. I've counselled may women over the years at the miscarriage association, and struggled not to fall apart myself, unable to take her pain away. We did all the things you are doing. And spent time talking about other things. All you can do is be there and let her talk. Days out and make sure her friends rally and perhaps distract.
And remember to talk to your close friends,because it's so hard for you.
My daughter became pregnant tw months later. Fraught with worry, I had luckily given a talk to the scan operators at the hospital about dealing with giving bad news, as my daughters experience was horrific. The head of the scan dept scanned her every week until 13 weeks and then she had a private scan at 16 weeks.
It's a long tough journey - my grand daughter arrived beautifully healthy, it is the emotional side for the parents that takes patience and time.
I pray you're daughter feels the joy soon, I'm here if you wish to pm me or your daughter is welcome to talk to me.