I use Figma (a UX design tool). It has browser support but I prefer the native app experience, I’ve seen there are Linux versions on GitHub but I heard they have some compatibility or performance issues sometimes and I need it to be 100% reliable as it is for work.

Figma has an unofficial Flatpak version available, which is a wrapper for the web version so I can’t speak for how well it works but it might be worth to give it a try on your Steam Deck? Just search for “Figma” in Discover when on desktop mode.

https://flathub.org/apps/io.github.Figma_Linux.figma_linux