Oh, this is how to properly move an icon from one iOS screen to another

Like so:

Btw, it works on iOS and some Android phones, not sure if it works on every Android. pic.twitter.com/yrWGhZbv1m

— Stan Schroeder (@franticnews) October 31, 2019

(You have to move the wiggling icon a tiny bit, and keep your finger on it, before swiping the screen with another finger.)