The host machine and the virtual machine can't be using the wireless card at the same time. You will need to buy a second wireless adapter, for example a wireless usb adapter and assign that to the virtual machine you are running Kali on.I am using Kali-Linux-2020.2a in a virtual machine (Oracle VM ) . and there is no WiFi interface. basically I am trying to use fern WiFi cracker. and turning on the monitor mode is a must in order to scan for access point.
Thanks, I really was desperate for a solution.The host machine and the virtual machine can't be using the wireless card at the same time. You will need to buy a second wireless adapter, for example a wireless usb adapter and assign that to the virtual machine you are running Kali on.