You don’t need to do anything to make it playable on PS4 apart from making sure cross play is turned on in your server settings (it should be on by default)
You’ll also want to change the server name so it’s easier for you to search/find and setting a password so you don’t get unwanted players joining.
do note there are major issues with the FS servers at the moment in general, mainly related to not being able to find servers but also connection issues.
Out deviated server was working ok to start with but haven’t been able to connect for 4 days now : / , game loads to 96% abs then crashes the game (PS4 & PS5)