Related access point to main router

[silan10]

Is there any options to scan access point connected to main router wirelessly or wired , even if are not in the same subnet
Main router : 192.168.1.1
Others : 192.168.x.x

[ZerBea]

No, because hcxdumptool is designed to perform OSI layer 2 attacks only.
Addressing, routing and traffic control will be perfomed in layer 3.
Tools like Wireshark or tshark can do it (monitor the traffic) - regardless of IP address or subnet mask.