I wish to put in a plug for Noto Sans Semicondensed for spreadsheets, although not generally for system-wide use.
I recommend it for my Tonto2 List Maker script, which uses a spreadsheet layout. Noto Sans Semicondensed has “tabular figures,” which means you can use it in tables to align digits and decimals with simple spaces and still have the look of a proportionally spaced font for text.
Noto Sans Semicondensed is available from Google, of course, but Linux Users will be more likely to install the fonts-noto-core package.
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.