The image on the right is how the settings app look on macOS 12. On macOS 13 (2022) it was changed to look more to the one on the left, with all the sections selectable in a sidebar and a smaller window. Many users have complained about it, saying that it sacrificed function for form and is part of making macOS more like iOS by mindlessly copying phone UIs onto computers which it isn’t meant for. I think its alright, not terrible. And it’s the norm with settings apps looking like that in Windows, KDE, Gnome, and some other DEs.
The grid on the right just shows you all your options.
The list on the left obscures some of your options behind a scroll down, which you will then realize you actually have to scroll back up for!
Behold! The power of search beckons you :P
I completely stopped caring about how the Systems Settings menu is organised after all the improvements they did to search a few years ago