To piggyback on @one1ofeach and @417WHB I also recommend repeating the grade. DD was very young for her grade due to having attended school abroad. When we applied for middle sch every school advised her to repeat the grade. I was reluctant because she was an A student, independent and mature. However, realizing that it was less about academics and more about socializing with peers, we relented. It was the BEST thing that could have happened to DD. We did not even realize some of the struggles she had gone through being nearly two years younger in some cases than her peers.
Fast forward to now and applying for BS I cannot imagine if she had been applying last year for 9th which would have been the case coupled with the fact that BS has lot’s of repeats is ‘away’ from home etc.