as i have moved from a old android7 - i have no idea how to access the all installed apps list.
in the settings i found a list - but from this one i am not able to get the apps to my homescreen
(in the setup process i let install the apps from my google backup - so they were not automatically added to the homescreen…)
swipe from the bottom of the screen up. you can also go to settings → gesture → system controls and disable gestures than you have the 3 buttons back.
(hope I translated every menu entry correctly because I have german as language).
but you should give the gestures a try, they are very simple and useful…