Men det skal bare være å dra på administrasjons tabben i routeren, gå på operation mode fanen og sett den i Access Point mode (AP)

Men det er ikke AP han vil ha. På et AP har man en fysisk kabel fra hovedrouter til (sin) router og så sender den et WiFi signal videre ut. Han vil ha en "trådløs bro(kabel)" der han kopler WiFi til WiFi og får kablet signal ut. Det er to HELT forskjellige saker og bruksområder.

Han vil ha dette altså?

Asus TUF-AX3000 V2 router does not work as a wireless bridge. However, it supports various operating modes, including Access Point (AP) mode, which can be used to achieve similar functionality. In AP mode, the Asus TUF-AX3000 V2 router can be connected to an existing network via Ethernet and act as an access point, allowing devices connected to its Ethernet ports to access the network wirelessly. While it may not have a specific wireless bridge mode, this operating mode can serve a similar purpose by extending the network coverage and providing wireless connectivity to devices. If you specifically require a router with a dedicated wireless bridge mode, you may need to explore other router models or consider using dedicated wireless bridge devices that are designed specifically for that purpose.