You don't want to load asuswrt load merlin instead, they have not kept asuswrt updated.
You can see something in the usage screens but at most you will see the sites they are using.
It tends to be extremely hard to monitor in general because of the https encryption. Companies quickly moved to https when it was discovered the government was collecting information. If the government can't see much you will no be able to either.
Even IP addresses do not tell much anymore. This site is a example. If you look the ip address up it comes back to akamai not tomshardware.