NonSteamLaunchers is a project to help you easily install various external launchers / game stores on Steam Deck like EA App, Battle.net, Amazon, GOG Galaxy, Ubisoft and more. Recent releases have much improved automatic shortcut creation in your Steam Library.
It can be a bit of a nuisance to set up all these extra stores, and remembering what games you actually have available so NonSteamLaunchers can make it all just that little bit easier.
The feature first introduced in January, NonSteamLaunchers now has a scanning system to automatically add game shortcuts into your Steam Library from all these launchers. Initially quite limited, the last few releases have expanded what launchers / stores it's able to do it for. As of version 3.8 released a couple of days ago it can now scan and add shortcuts for Epic Games, Ubisoft Connect, EA App, Gog Galaxy, Battle.net and Amazon Games.
See more on the GitHub page.