This is dreadful. Your daughter should have been able to make an informed decision about her medical care - it's quite likely she would've been fine with a TVU, and they should've attempted if she was willing.
On the topic of hymens more generally - I remember, over 20 years ago when I was still a teenager, doing research and reading about how the Swedes had renamed the 'virginity membrane' (hymen) the 'vaginal corona', and learning that tearing/bleeding wasn't actually the norm, and that the (usually very elastic) vaginal corona is more often stretched and slowly worn down over time, although vaginal childbirth is understandably usually pretty destructive to whatever remains of the corona, I believe.
As this article points out:
One small study of 36 pregnant teenagers published in 2004, for example, found that medical staff were only able to make "definitive findings of penetration" in two cases. Another 2004 study found that 52% of sexually active adolescent girls interviewed had "no identifiable changes to the hymenal tissue".
And:
Some hymens may bleed when first stretched if the act is abrupt or if you aren't relaxed, but any blood is actually far more likely to come from lacerations to the vaginal wall due to forceful sex or a lack of lubrication.
And while this page uses ridiculous 'gender ideology' language, the facts about the vaginal corona are accurate:
No matter what their vaginal corona looks like, fewer than half of all people with one bleed when they have intercourse for the first time. Of those who do bleed, few do because the corona was tight; instead, there are usually other reasons.
And:
What’s actually there is the vaginal corona, consisting of elastic folds of mucous tissue, which can’t be ruptured or broken in one fell swoop by a penis or any other object inserted into the vagina. When the mucous tissue is stretched, minor ruptures sometimes develop and may smart a little. These soon heal, usually within 24 hours.