EDIT: I didn’t read the username! I’m sure you know all of that!
The most direct path to something similar to your screenshots is probably List and Tree Widgets · Gtk.jl
Other frameworks, are GitHub - barche/QML.jl: Build Qt5 QML interfaces for Julia programs. (which requires you to know a bit about QML itself), or you could try web engines like https://genieframework.com/ or GitHub - davidanthoff/Electron.jl: Julia wrapper for Electron or GitHub - JuliaGizmos/Blink.jl: Web-based GUIs for Julia.
The quickest path to get something similar, but not that REPL based, could be Pluto.jl. Not sure if that fits your application though, but very nice for prototypes and if the available views are not what you are looking for, it is super easy to write your own small HTML/JavaScript for custom visualizations.