I'd imagine you take the position that a child seeking this care is always confused. Could this be mistaken? Your argument would be void, if so.
Further, the quotes you make from the studies you cite are misleadingly cherry-picked - the studies themselves do not support the conclusion you imply they do. They are both calls for further research - they are not studies which draw any conclusions about the risk/benefit trade-offs of treatment and they do not state that treatment should be withheld.
> "The primary risks of pubertal suppression in gender dysphoric youth treated with GnRH agonists include adverse effects on bone mineralization, compromised fertility, and unknown effects on brain development." -https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5290172
No one denies this. Again, it comes down to benefits of treatment versus risks of no treatment.
> "GnRHa therapy prevents maturation of primary oocytes and spermatogonia and may preclude gamete maturation, and currently there are no proven methods to preserve fertility in early pubertal transgender adolescents." - https://pubmed.ncbi.nlm.nih.gov/31319416/
Same here.
Surely a patient and doctor have the right to decide to risk infertility or a lack of bone density later in life in order to prevent severe mental anguish and potential suicide now? Would you rather demand the child continue to suffer so that they can have, according to you - as though it were your decision for whatever creepy reason, the best chance of making more children they may not even want or strong bones they may not even use on account of having committed suicide before reaching adulthood?