There's many different ways to get third-party launchers onto Steam Deck like Battle.net, EA, Epic Games and many others. Here's one way that does most of the work for you.
You are not logged in. However you can subscribe from another Fediverse account, for example Lemmy or Mastodon. To do this, paste the following into the search field of your instance: !steamdeck@sopuli.xyz
A place to discuss and support all things Steam Deck.
Replacement for r/steamdeck_linux.
As Lemmy doesn’t have flairs yet, you can use these prefixes to indicate what type of post you have made, eg:
[Flair] My post title
The following is a list of suggested flairs:
[Discussion] - General discussion.
[Help] - A request for help or support.
[News] - News about the deck.
[PSA] - Sharing important information.
[Game] - News / info about a game on the deck.
[Update] - An update to a previous post.
[Meta] - Discussion about this community.
Some more Steam Deck specific flairs:
[Boot Screen] - Custom boot screens/videos.
[Selling] - If you are selling your deck.
If only there was a good (non streaming) way to get access to Game Pass games on Deck without installing Windows.