cant join friends minecraft server cross platform

I've tried it in the minecraft preview and it works fine, but i would prefer to play it on regular minecraft since I play a lot of cross-platform with my friends and they wouldn't be able to join me.

Please ensure cross-platform play between Nintendo Switch and PS4 players, all players involved need to be using the Bedrock Edition of Minecraft and have Microsoft accounts. If your friends on PS4 are still using the PlayStation 4 Edition, they won't be able to join you, and you won't be able to join them. Unfortunately, there is no direct fix for this, as the cross-platform play limitations are determined by the game's edition and the platform.

As of September 2021, Sony had relaxed its stance on cross-platform play, so it's possible that Minecraft's Bedrock Edition might have become available for PS4 by now. If this is the case, make sure your friends on PS4 have updated to the Bedrock Edition, and they should be able to join your game using their Microsoft accounts.

Microsoft have said they will be introducing more servers to Minecraft and that it will be cross platform but that won't be for another several months.

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Basically, why cant the Switch version of Minecraft cant see or join LAN servers? Its the same Betrock version, other platforms can so why cant Switch?

2nd question was why isn't there a Steam or Linux version of minecraft so its playable on Steam Deck?

Hey there, to access cross-platform you'll need to link your Epic account to Xbox Live. You will also have to have a friend who's not on Xbox to enable the cross-platform servers!