I have 2 android devices, asus and xiaomi. I don't really use much them, meaning the few times I do I have several standing updates, most of them from f-droid.
On debian I enter a command and the machine downloads and executes all standing upgrades at once.
I don't know if I don't understand android, but on the gui I have to first download the application and then click again to install it. I am never shown an option to bulk download and install, which would save much time.
Is it supposed to be like this? Is there something I don't know?
on the gui I have to first download the application and then click again to install it
What "gui"? Are you using the Google Play Store app or something? Because other apps like F-Droid, Obtainium, Aurora Store, or the default GrapheneOS App Store indeed do offer a one-click "update all" button. I cannot speak for Google Play, though.