To amplify a bit on previous answer:
(My previous Android experience was YEARS ago, back on Android 7.x, and now I've been transported from Android 7.x to Android-13: Wow...my world has REALLY CHANGED!)
Two weeks ago, I bought a new Android-13 based phone (Samsung Galaxy-family). To summarize, I've struggled
getting home-screen(s)? and app-screen(s)? arranged
to my satisfaction, and have had to do 'factory-resets'
a couple of times in the interim, due to what I'm calling 'bugs' (to be honest) and calling 'anomolies' (to be kind). Today, I learned some history: that my new Android-13 phone comes with a built-in 'skin' known as "One UI" (version 5.1, to be exact).
Let's talk about this (new?) 'two-layered' arrangement of 'icons'. In two-layered mode, it seems that all pre-installed icons are in alphabetical order. (Notice however that when you install more apps, they just get inserted into the next empty slot at the end, thus breaking any initially alphabetized ordering.)
At any rate, I think that these DRAWERS refer to levels. So, left-right swiping is staying within either the HOME-DRAWER (level) or the APP-DRAWER (level), and each drawer has its own separate series of 'dot-counts' (near bottom of the page) that indicate how many screenfuls of icons there are, and which position-relative horizontal screenful of icons that you're currently looking at.
So 'app-drawer' screens can be identified by fact there is only a 'search' field at the very top, and the
'dot-counts' at the very bottom...remainder of page is a full matrix of icons.
Whereas, 'home-drawer' screens can be identified by
the fact that, at top of the page appears the "time/temperate/city-name" line of info, and near bottom are the 'dot-counts' and at very bottom are a single row of your favorite/most-frequently-used icons.
But now I've got to add what I REALLY think: This is a PISS-POOR initial design/layout they begin with!!! What they SHOULD HAVE DONE is to have the built-in wallpaper
for the HOME-DRAWER (aka the 1st-floor) be 'light-yellow' [day-light metaphor] and DIFFERENT colored-wallpaper for the APP-DRAWER (aka the basement) be a'dark-ish' gray [night-light metaphor].
(Damn...wish I could figure out some way to ACHIEVE that background coloring, but so far, that doesn't seem possible !!!)
The 'show-stopper' in this whole mess is that their decision to even allow a SINGLE-LEVEL layout concept
is a FLAWED idea!
Because, notice that there's even an additional setting to have 'hidden' sub-group of app-level icons. As it
turns out, even if you knowingly never explicitly turn on 'hiding', their algorithm being used when you choose to switch from two-level mode to one-level mode, they
will just DISAPPEAR some icons on you, leaving you totally in 'MUMBLE-MODE', and deciding to return your
'broken' phone rather than resorting to 'factory-reset'!
Don't fall for it...STAY in two-level mode, as though
your life depended on it!!!
My 2-cents worth. Hope this helps.