Question about airodump-ng

Hi all,
when i run airodump-ng --bssid… in my home everything works well however, i went to a friend and tried to hack his wifi i did saw the router when run the command airdump-ng forward my wifi interface
but when i run the command to track the devices that connected to the wifi (airodump-ng --bssid etc)
i did not see anyone connected and i know that were devices connected.
why that happens?
this is something related to the adapter?
thanks for the helpers and all the best,

Hi @chip, if it works at one router then it should work at every router I suppose. Check that your adaptor is in monitor mode or not.