Supervisor on Sidebar

I am new to HAOS, so excuse the lame question.

I see in lots of YouTubes the ‘Supervisor’ button in the sidebar, but I cannot see it in the current version I have just installed.
I understand Supervisor was a separate add-on ?? but has now been included in the main HA install and appears in the settings under ‘Integrations’, is this the reason its not shown in the sidebar.

I see this YouTube, it calls the supervisor a ‘panel’, and advises how to add it to the side bar, at least i think that is the videos purpose,

As an aside - I note the ‘restart’ and ‘shutdown’ button is hidden away in settings, is that to keep it away from misplaced button pushes >?

From my memory, the Supervisor panel was included a few years ago, but was taken out, and what I recall was that it pointed to the AddOn page which is now available via Settings->Add-Ons. Some liked the Supervisor panel so they used the panel_custom yaml config to bring it back. The YouTuber however has it pointing to a page tbh I don’t recall ever seeing before. AFAIK the Supervisor panel is still not part of a default install.

Thanks for the pointers, I found this thread which I think gives the correct instructions on how to add Supervisor to the sidebar:

which points to: