This has been the case for all of my past virtual servers.
However, today I created two new virtual servers on the same server and they don’t have this button any more. I never changed any setting and don’t know how this happens.
That generally indicates you’re using now using encrypted passwords. Virtualmin does not know the password if you use encrypted passwords, so it cannot show it to you.
Weird I can see the password on the user I have for my user, but other users I can’t. I checked my user in webmin and its show the password as encrypted.