So me and my friend have somewhere inbetween 1.18 not been able to connect to each others worlds.Every time we try it shows connecting to multiplayer world for a few seconds then shows "unable to connect to world". We both play on playstation 4 minecraft bedrock edition. Both our games are up to date and we have tried a lot of things. My friend even redeemed his account, still nothing. Interrestingly, his cousin who plays on mobile can join his worlds. Hope this info helps.