Minecraft Crossplay

Ab
- in Xbox
3

So I know Minecraft (Win10) has crossplay with Xbox and Ps4

So my problem is, a friend (xBox) creates a map - I come in no problem,

My roommate (xBox) creates a map I can't get into it

A colleague creates a map (Ps4) I can't get in (no connection to the world like everyone else)

I create a map (Win10), nobody has a connection to the world

So I only come into the map of a friend who has xbox. I'm neither in my roommate's xbpx map nor in the world of my colleague who is playing on ps4 and NONE in each case comes into mine (the settings are always the same) what is the problem why is it not?

Sa

Everyone must have a Microsoft account.
All must have the same NAT type.
If this is true but it still doesn't work, reinstall or see that the ports are open.

Ab

Can I check the NAT type somewhere?

Sa

Access your WLAN Box on the Internet, it is often there