If you're using Steam and installed it as a flatpak you may noticed that it doesn't make any installed game icons to your Desktop.
Here's how you do it:
- Go to ~/.var/app/com.valvesoftware.Steam/Desktop and drag the icon(S) To your Desktop.
- Open the icon with the text editor app.
- Change Steam steam://rungameid/XXXXXXX to xdg-open steam://rungameid/XXXXXX