Interestingly enough, Abbott and DeSantis may not be in agreement with the CDC, but they are in agreement with a good number of health departments from the rest of the western world. As highlighted by Fox News, many developed countries have come to the same conclusion as Abbott and DeSantis in that it’s unnecessary to mask children, if not irresponsible to do so:

The European Centre for Disease Prevention and Control, an agency of the European Union, does not recommend masks for children 6 and under in any setting or for children 12 and under in a classroom setting. In the Republic of Ireland, children ages 13 and younger are only advised to wear a mask if they attend middle school. In Sweden, children have never been told to wear masks in school.

In Iceland, children ages 15 and younger are exempt from mask requirements. In Norway, schoolchildren 7 and younger are not required to wear masks. When it comes to the U.K., which is reporting a similar COVID-19 surge as the U.S., public health officials in England and Wales are no longer recommending masks in classrooms starting this September. In Scotland, children 12 and under are no longer required to wear face coverings in public places. And officials in Northern Ireland have indicated they plan to drop masking requirements in schools this fall.

In New Zealand, masks are not recommended in schools or for children younger than 6 in any public setting, but children or teachers who wish to wear them “may do so if they want to” and “should not be criticized for doing so,” the country’s Ministry for Education website currently states.

https://www.foxnews.com/politics/desantis-abbott-school-mask-foreign-countries