Just had a call from my daughter Alice whose husband died suddenly in October. She is grief stricken and wants him back. All I can do is comfort her and lift her up in prayer, and hope the Lord will make His presence known and lead her back. She lost her faith when she went to college - time she returned.
The more you love the harder the pain of losing someone; I still cry for David. May the Lord strengthen and comfort her and bring her through this. She is coming for a visit so I'll see her on Sunday after a 9 month absence. Never expected her to be widowed at such a young age. Sad times.
Prayers for your daughter and to you and your family. There is a book entitled 'Imagine Heaven' by John Burke that might offer your daughter some comfort.
https://www.christianbook.com/imagine-experiences-promises-exhilarating-future-awaits/john-burke/9780801015267/pd/015267