Open org-brain from org-mode headline issue

[techapu]

I upgraded to emacs 28.0.50 in Guix SD 1.3. I had a debian 10 emacs 27.1 installation. It was working pretty good, even when I have a very big database. To circumvent some slow access issues, I've got used to search the headline with helm-rifle or helm-swoop, and then call org-brain-entry-at-pt, with a convenient keybinding.
But in my new installation, that command doesn't appear in M-x, it isn't there. I read the code and it exists as a lisp function, but it is not callable now.
Is it so? Or I have a build issue? Is there any way to go from the org-mode file to the brain now without waiting?
Org-brain-visualize asks me an entry prompt, take some time, more than some. I tried org-brain-goto, org-brain-goto-current, and the likes. All asks ne for an entry prompt. Doesn't take my point.
Thanks for this amazing package! I wish I had the time to collaborate, I wish I knew more Lisp to help!

[Kungsgeten]

I don't think org-brain-entry-at-pt has ever been an interactive command. You could try M-x org-brain-visualize-entry-at-pt, it shouldn't prompt for an entry if you're at one.

[techapu]

In my build it isn't appearing. You are right, that was the function I was using. Do you imagine what can be broken to not showing that option in my system? I build it two days ago, but the code in general is working. That issue I asked for, is the one is bothering me. That puzzled me.

[Kungsgeten]

I'm not sure. Have you installed org-brain from MELPA? If you've used MELPA Stable you probably have a very old version.