Well, I noticed this change a while back, but I didn’t want to say anything until it was officially announced by the KDE Project, which finally happened today.
The announcement comes from renowned KDE developer and maintainer of the KDE neon distribution Jonathan Riddell, who made the big change public today on his personal blog. So there you have it, KDE Applications (or KDE Apps for short) is now known as KDE Gear, and the new name will be reflected in the upcoming release, versioned 21.04, due out on April 22nd, 2021.