Hi OP
Binding is harmful despite many messages of positive outcomes your daughter may hear.
Here is a study.
https://www.tandfonline.com/doi/full/10.1080/13691058.2016.1191675
This is a ”cross-sectional 32-item survey was administered online to an anonymous, non-random sample of adults who were assigned a female sex at birth and had had experience of binding (n = 1800). Multivariate regression models were used to identify practices associated with self-reported health outcomes. Of participants, 51.5% reported daily binding. Over 97% reported at least one of 28 negative outcomes attributed to binding”
Then
“These outcomes were: rib fractures, back pain, chest pain, rib or spine changes, bad posture, shoulder pain, shoulder joint ‘popping’, muscle wasting, numbness, headache, overheating, fatigue, weakness, lightheadedness or dizziness, cough, respiratory infections, shortness of breath, heartburn, abdominal pain, digestive issues, breast changes, breast tenderness, scarring, swelling, acne, itch, skin changes and skin infections.”
And
”Experiencing any health outcome related to binding was nearly universal, with 97.2% of participants reporting at least one negative outcome they attributed to binding. The most commonly reported outcomes were back pain (53.8%), overheating (53.5%), chest pain (48.8%), shortness of breath (46.6%), itching (44.9%), bad posture (40.3%) and shoulder pain (38.9%) (Table 3). Of the categories examined, skin/soft tissue and pain symptoms were most common, with 76.3% of respondents reporting any skin/tissue concern and 74.0% reporting any pain-related concern.”
It is worth remembering this was adults being surveyed. Not growing children! I cannot imagine anyone would say that adolescents would have better results, I expect it to be much worse!