I’d be interested to know if you use any bindings/plugins for Renoise with steamdeck controls.
I use a headless M8 and run https://derkyjadex.github.io/M8WebDisplay/ in Edge (with launch options for game mode). But I didn’t really put in the effort to try and make Renoise work without a keyboard/mouse.
Definitely recommend customising plasma per the above advice.
I’ve done the same thing with my steam deck (with White Sur theme) and it’s flexible enough to get fairly close.
Until recently I ran a similar setup with latte-dock on my work laptop and but it’s not worth the hassle - it’s buggy and unmaintained, so I swapped back to icon only task manager.