WHY cant the SWITCH version of Minecraft see or join LAN servers?

Here is a thread that might actually help with your issue: I can't join minecraft servers on nintendo switch - Microsoft Community

Hi.

I tried with another wifi network and works 100%

So i think the problem is my own wifi but dont know why doesnt work with minecraft ream (because i can see minecraft marketplace but cant join realm)

Yes it works but my internet is so bad that we disconect every 2 minutes thats why we wanna play in LAN but I cant see her world and she cant see mine.

Same here. The friends tab in Minecraft xbox changes the number underneath it as my LAN friends enter their world on their devices, so xbox is definitely recognising that they are there. I see that number change within seconds of them starting on their
device. But underneath that, it still says "your friends are not playing Minecraft right now" when they quite clearly are. My friends on other devices see each others joinable worlds, but I cant see those same worlds from my xbox. They can see my xbox worlds
and join, but i cannot see theirs. Help!

There are a number of Minecraft versions out there, so it's possible you're seeing them mis-matched? And even if you
are both on the Bedrock Edition, to join each others worlds, you'd need to be on the same version. Check what version of Minecraft each are, and check what version of software it is.

If it's not a compatibility issue, the next thing
I'd check is the Privacy and Online Safety Settings for your accounts verifying that it allows playing in the configuration you're trying.

Hi!

both account are adults. so it should not be a problem right?

when i start our world on lan, he gets a notification in game that 1 of your friends is playing, but when he goes to the friend tab in game, the game cant find any friends playing mean while the tab says 1. we both have the newest update 1.13.