You can, I’ve done it myself, but most plugins are geared to run in the Big Picture mode instead of the Desktop UI.
For example, the SteamGridDB plugin only runs in Big Picture, and despite showing its menu option the desktop, clicking it gives you a broken window.
Meanwhile, the CSS Loader plugin runs on both, and there some themes specifically geared to modify the desktop UI, like the lovely Metro for Steam skin recreation by Rose
On steam deck there’s a decky add-on to do that
We need decky for desktop steam.
Can you not install it? There’s really not much difference between a Steam Deck and a Linux desktop.
You can, I’ve done it myself, but most plugins are geared to run in the Big Picture mode instead of the Desktop UI.
For example, the SteamGridDB plugin only runs in Big Picture, and despite showing its menu option the desktop, clicking it gives you a broken window.
Meanwhile, the CSS Loader plugin runs on both, and there some themes specifically geared to modify the desktop UI, like the lovely Metro for Steam skin recreation by Rose