Well, they are sortable— you just have to sort them yourself.
But Apple really doesn’t necessarily expect you to launch all your apps from the icons anyway. Once you have pages and pages of apps, it’s easier to just use spotlight search and tap the first few letters of the app’s name and launch it from there. Honestly not any slower than scrolling through pages and pages of Android’s app drawer. It’s how a lot of people launch apps on their Macs too. And PCs.
Perspective is everything, as I never launch apps this way. Not to say any one way is correct/incorrect.