Can my kids return to sports after mild covid? what are the current risks/ concerns for post covid children? is heart inflammation really common from covid alone? should she not play soccer?

I answered your other question. Heart inflammation is a very rare complication so she should not be forbidden from sport activity. However, she should have a complete rest during recovery phase especially if she has symptomatic Covid-19 infection. It is safe for her to resume all routine activities after 2 weeks since the time she is symptom free. Take care.

At that age, especially, heart inflammation would be extremely unusual, so agree with other docs that I would not restrict them from playing soccer, especially if they are feeling fine. Once the 5 days of isolation and 5 days of masking has ended and if they are feeling fine, there should not be a risk. If you are still concerned, please speak to their doctor.