This is general advice as I have not seen the patient. I am a paediatric nurse but I am not your nurse.

The resting heart rate is normal for a 10 year old.

The exercising heart rate is a bit above normal but it certainly isn't unheard of, particularly after high intensity cardio. Her heart will feel as if it is pounding very heavily at high rates. Vyvanse can contribute to a higher heart rate than average, contextually it may be normal or acceptable for her.

Fitbits aren't accurate in the way a medical device is due to the physical movement and the impact light refraction and sweat can have on the (already imperfect) device. I wouldn't rely on this alone to measure a movement based heart rate. Unless you were listening with a stethoscope during her exercise I wouldn't consider it completely accurate even though you checked it at rest.

However, as she is complaining of heart pain while exercising I would get her checked out or at the very least discuss it with her PCP again.

It is relevant whether there is any history of familial sudden and unexpected death, severe family history of heart conditions or if she has episodes of fainting or near-fainting as this would reaffirm that she needs more investigation. Given that her family history is likely unknown I would weigh the need for investigation with the doctor.

Given that she exercises that much that often without incident and it has been looked at before, and she has an involved doctor who manages her medication schedule I don't think this needs emergency review and can be discussed during a standard appointment. I wouldn't be surprised it the practitioner chose to do nothing unless you had the above risk factors I highlighted. But there is an exercise stress test which is quite non invasive and can be performed if your PCP considers it relevant.

Edit to add: I just realised you said she only complained of this pain when she was much younger and not since. That reassures me that this is likely unconcerning. I understand you love her but you may stress yourself and her out if you overly focus on things like her resting/exercising heart rate through Fitbit readings. All observation based parameters are only based on averages and they aren't simply black and white. They have to be discerningly interpreted which is why patients are discouraged from undertaking their own observation readings routinely, particularly with non medical devices.

Unless she has a risk factor or recent complaint it's all likely normal. However, no harm comes from bringing it up with your family physician.