Hello,
Thanks for reaching out!
You are correct that that article only applies to the Community Events form. There is not an out-of-the-box way to make these fields required on the admin side, but you could do this via a customization. If you’d like to give it a shot, our themer’s guide is the place to start. We also have a list of recommended developers that you could contact if you would like to get help with the code.
If this is a feature that you would like to see added in the future, please do let us know over in our Feature Ideas Forum! This is what we use to gauge user interest in new features and help guide future development efforts.
I’m sorry I don’t have a more straight-forward solution for you here, but if there is anything else that I can help with, please let me know!
Thanks,
Jennifer