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.
I find the left one better, but still very cluttered.
Many categories could be merged to keep it more glanceable and create less choice paralysis.
The list to the left is the way to go, but maybe we should have subcategories or some other type of grouping within them?
I don't know UX design, but I know I feel they both are a bit much to take in and not intuitive to navigate.
I like the Gnome settings app better! 😄