Actually, This is kernal and Wi-Fi driver problem.
If you are suffering with kernal problem then reinstall your kernal by
$ sudo apt-get install $(uname -r)
And if you suffering from Wi-Fi driver problem then install it from synaptic or just follow this step
Hello there, I just installed my new OS - Kali Linux 2020.1. Everything is fune, but I don't have option to connect to wifi. (Wired connecting is working perfectly). I tried a lot of commands but nothing helped me. When I type iwconfig I get this -
eth0 no wireless extensions.
please help me...