Polybar works on KDE, it’s not restricted to Tiling WMs like i3. You can add it to your Autostart apps in KDE either directly with arguments or a simple shell script to run multiple custom bars.

https://github.com/polybar/polybar

Edit: This blog post I found shows an example of a similar tiled end result in KDE with Polybar (but with a very different colour scheme) https://blog.rishikumar.dev/posts/plasma_polybar/