You can add friends in "Minecraft" through their Microsoft account's gamertag, regardless of which platform they use to play the game.

Starting Co-Op Multiplayer in Minecraft Legends There are a couple of ways to enjoy Minecraft Legends with your friends. The first is by joining a friend, or inviting them to your own game when ...

Minecraft Legends multiplayer online allows players to either play co-op or competitive, with up to four friends working together.

To invite friends to Minecraft Dungeons you need to start an Online Game, after which you can either invite them to your session or join theirs.

Run Minecraft Java on your Steam Deck with my straightforward step-by-step guide, using Prism Launcher to keep things simple.