Can't access fritz.box URL so can't use reset password link which has fritz.box in it's URL. : r/fritzbox
How to Change Default Router Password on FRITZ!Box 4040 Router – Video Tutorial - YouTube
too much Wifi WLAN exposure is a health problem – About AVM FritzBoxes (7390) Rename Network Device – Netzwerk Gerät umbenennen – Rename Router Device change hostname netbios name – Meshing