Blocks Layout Issues - Missing Regions

After previous issues, reported in https://www.drupal.org/project/aristotle/issues/3332052 🐛 Not installing on Drupal 10 RTBC and being informed all was working correctly, I installed Aristotle per the profile instructions. composer require 'drupal/aristotle:^3.0' The Theme installs without issue. I went to the Appearance panel, and installed Aristotle as default. I then cleared caches, and refreshed the screen, and only the Content block displayed. I checked the block layout and found most every region was vacant. I proceeded to populate them with all of the basic information, putting the Site Branding in the Branding region, the Main Navigation in the Menu region, Main Content block in the content region, etc. and saved it. Refreshing the screen, I find multiple issues.

1) The Main Navigation block does not show up. I attempted to move it to the "Admin Opigno Menu" region, still nothing displays.

2) The Site Branding information does not display.

3) Contrary to how it is shown in the example on the block layout screen, when I place something in the First Sidebar region, the sidebar displays at the top, and then the content displays BELOW the sidebar, not to the right of it.

Just a quick look at the page--front.html.twig file shows that none of these regions are even included.

The only regions showing in this file are "Help", "Sidebar First", "Status Message", "Content", and "Footer".

The "Branding", "Menu", "Admin opigno menu", and "Top" regions are completely missing. I am at a loss as to how basically half of the regions have been "missed". Yes, I can plug them in, and create a patch... but as there is no "example" screenshot of what this theme is even supposed to look like, I'd be guessing, at best as to where those regions were "supposed" to go.