Because Google apparently liked it this way and introduced these changes in the Android 12 (S) base, from which all stock OS vendors and custom ROM communities make their Android 12.
The name is “Quick Settings”, and you would have had the same look already if you would have been on Android 12 (S) with /e/OS 1.8. It’s not the /e/OS version that’s responsible, it’s the underlying Android version.
There are ways to customise this menu in the way you like. I saw mentions of “AOSP Mods” and “Power Shade”, but I have no experience with either.
(I use the Quick Settings menu so rarely that after adding the seperated Wi-Fi and Mobile data toggles back to the menu I decided to not bother any more.)