Whitelist Issues and Category Problems

So I submitted a ticket on Dec 1st, which is ridiculous turn around time. 

Here's my issue. I have a Netgear Router provided by my ISP. Because of COVID my kids are doing school at home. My middle one has ADHD and can't NOT watch YouTube or search the web if it's available on his PC because of his impulses. The only thing that works is actually blocking the site on his PC. I also have to block the majority of other sites as well, so I have a custom filter set with specific allowed categories. 

I have two problems, one when I use the whitelist to always allow regardless of what Firewall levels the PC in question has on it, it doesn't work. So then I end up going and removing whatever category the site he NEEDS to access from the blocked list, but then he can get to sites I don't want him to access. 

The bigger issue is sites that are KNOWN educational companies like Pearson, are still being blocked even though I have educational sites unblocked. Sites like CNN which are KNOWN news sites are being blocked even though I have News and Media allowed as well. 

Also, where is a frickin list of what category a site is classified as cause obviously CNN and Pearson are set wrong. And since I don't know what category to unblock and whitelist isn't working I end up having to let him use my phone. It's really annoying.