I checked /usr/share/john directory I don't see gpg2john.py there. Also john seems to be of latest version
Code:
apt install john                                                                                                                                        
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
john is already the newest version (1.9.0-Jumbo-1+git20211102-0kali1).
Kali version is:
Code:
lsb_release -a
No LSB modules are available.
Distributor ID: Kali
Description:    Kali GNU/Linux Rolling
Release:        2021.4
Codename:       kali-rolling