@DanielGB If you really need to know, then you could try your luck with a free utility called "Nmap". It can give you an "Uptime guess", which, despite the name, actually works well more often then...

@_Luca_ Actually, there is one difference listed on the product page for the AX21. "Improved Vent Design: Unleashes the full power of the whole machine."

@LarryHL Commercial routers for home use normally open the ports that are required for a certain service on their own when you activate that service. Anyway, I have a TP-Link AX50 and didn't need to...

@Gilberto4mori If no user manual is available for your particullar model, then you second best choice might be to resort to a manual of another router model with similar functions. For example the...

@Maddy01 Are you sure you pressed the reset button long enough to trigger the factory reset? Do the Wi-Fi status LEDs on your router light up again shortly after you've performed the reset?

@cgty I don't know how TP-Link's website blocking works, but if it's done via DNS filtering, then you might want to check which DNS server is specified on the Chromebook. In case there are more (or...