When you do a risk benefit analysis of whether or not kids should wear masks all day, the choice is clear.
Unless they have some serious immunosuppressive condition, there is absolutely no benefit to kids wearing the masks.
And the risk of having them wear a mask all day is that they could get bad case of mask mouth that rots their teeth and causes periodontal disease. Periodontal disease can lead to heart disease and eventually, death.
Obviously forcing kids to wear the Muslim face covering is not a good idea.