At the time of writing, Roblox chat on PS5 or PS4 is not available so you cannot access it or use it to communicate with other players. This is in fact a wider issue with the game on consoles as a ...

There is no official Roblox on PS5 release, ... Although you can type in your details manually on the console, ... It's also currently not possible to use Roblox chat on PS5 or PS4, ...