This is probably NOT what you had in mind. What I use for launching apps under Gnome 43.9 is a traditional file manager. Historically, nautilus was Gnome’s file manager. I note that Gnome still has a file manager, but they don’t call it that. Over time nautilus has been gutted of a lot of its functionality. Thus, I have switched to PCManFM, which is a lightweight lookalike. I autostart it in my Desktop folder, which holds a handful of *.desktop shortcut files. I like the look of the “Icon” view mode because it reminds me of the old Windows 3.1 desktop. Alas, there is no grouping like what you’re hoping for (so far as I know), but you could create shortcuts to other *.desktop folders. PCManFM displays a tabbed window, and you can drag and drop icons onto folders on a window, and between tabs. I launch apps by double-clicking icons.

There’s always RetroShare.

Tor Browser on both Linux/Gnome and Android. I believe I get not only the benefits of ad-blocking and anti-tracking measures but also IP-obfuscation through the Tor network. Sure, there are sites that won’t serve content to the Tor network, but screw them!