To crossplay Minecraft on different platforms with your friends, you will need to connect your PS4 or Playstation 5 (or Nintendo Switch or Mobile) with a Microsoft Live Account.

A Microsoft account is not required for Minecraft on PS4. However, it’s an option. A Microsoft account is optional and not required to play Minecraft on PS4. You can also transfer your Marketplace and Minecraft Store purchases to other platforms with a Microsoft account. If you do not have a Microsoft Live account, you can sign up for an account at https://signup.live.com, for free.