Hi, I would like my Asus AC86u, used as a VPN router, to connect to the Wifi of an AirBnb condo I'm staying at. Is it possible? I believe I need Wi-Fi Bridge mode but can't find that setting.
You should be able to use DD-WRT or OpenWRT to get WISP functionality on consumer routers. Being as this is a Broadcom based router DD-WRT might be your only option assuming they support your model.