I executed all the codes above and the result of

Code:
rfkill list
is below:

Code:
0: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: yes

while when I ran the command:

Code:
iwconfig
I got this below:

Code:
wlp2s0f0  IEEE 802.11  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=off   
          Retry short  long limit:2   RTS thr:off   Fragment thr:off
          Power Management:off
          
lo        no wireless extensions.


enp4s0    no wireless extensions.
Thanks in anticipation of your next assistance.