Aka MS Remoteconnect: Microsoft allows Minecraft players to play on multiple devices, such as the PS4, Switch, and a Windows PC or Mac. They can also play on smartphones Android or iOS with their Microsoft account login. To play Minecraft on PS4, you don’t need a Microsoft account. However, an optional one is available.
You can crossplay with your PS4 on non-PS4 devices or consoles with the Microsoft account.