'COPPA took effect in April, 2000 and was amended in 2013. It applies to commercial websites and online services (including mobile apps and IoT devices) aimed at, or known to be used by, children under 13 that collect, use, or disclose personal information. It requires that such services provide notice of data use and obtain parental consent.'
It should prohibit collection, use and disclosure of said data.
That way there would never be a need for parental consent.
Such consent may be difficult to avoid if the child is told to use a service by an educational establishment, at which point it's not really consent any longer.