Android's new developer verification rollout begins, sideloading changes are next
(www.androidauthority.com)
Yes that's what I'm saying, it's "installing" regardless of where you get the app, so if an article wants to talk about something concerning installing apps from outside the Play Store, they can't just say "installing". That would be incorrect if the things they talk about don't concern installing from the Play Store.
So you need a different description than just "installing".
E.g. in this example the article title couldn't be "installing changes are next", it would need to be something else.
"Installing" is not a drop-in replacement for "sideloading" without changing the meaning of what you say.