"oh this is normal" or "you'll get over it," .
No one suggested "get over it". The suggestions have been...... it will come back. These are 2 different things
Its normal because it happens and she is not the only one. The child is not the only one this has happened too. They need to know this. They need to know it happens and it comes back.
No one has suggested that it is not a big deal to the child.
What was suggested is to not buy into their big deal so it therefore becomes an even bigger deal.
Rather like the toddler learning to walk. They fall, they look to parent. Parent makes a big deal OMG, poor darling, are you OK, they burst into tears. Parent goes oops you fell, well get up keep at it. And they get up and boggle on. Wow Mom/Dad is upset so this must be an even bigger deal then I thought.
You lead with I'm sure its frustrating (you acknowledge the stress of it and be done). Then you reassure, it will come back. And if more is needed from as the parent is listen and brainstorm for problem solving. Listen to your coach, step back, time to heal, reduce stress.
No one said to tell a child they will "get over it".
Personally, JMO I would have a meeting with my kids coach so I know their plan and I would suggest they engage the child in the plan. Everyone young and old deals better when they buy into the plan. But as a parent. Nope no gym advice. Empathy, overall patience and practice give it time stuff.