but i don't need that.
ATM I'm on my laptop with Gnome shell and 3 desktops, everything I need in 90% of the time I have opened all the time and then just switch between desktops. The same was on sailfish, swipe left and switch. On AOSP, swipe up to bring nav bar then "multitask" button.
Why bother with opening app from lockscreen when it's faster to keep it opened and then just unlock the screen?

Like I said, I didn't find that useful to me.