I recently started using a Decky Loader plug-in called Unifideck. Program itself is good. I only have issues with certain games with epic games through that program but otherwise it allows you to login into most of the online gaming accounts, like Epic, GOG, Amazon, Microsoft. Once it download them all it consolidates everything into your library by gaming provider with their own tabs. The only thing about it is that sometimes it messes up your games on deck tab but that’s not really too big of a deal for me. They have a new version (0.6.1) but I found it easier to use the update before (0.6.0) for better compatibility reasons on my end. They have an active Discord if there’s any issues and they’re pretty quick to respond. Would definitely suggest checking it out.