There is no official Roblox on PS5 release, but that doesn't matter as you can use the PS4 version, so here are the details for how to set it up.

As scrutiny around Apple’s and Google’s app store fees ramps up around the world, Roblox is now offering users who buy its game currency, Robux, on the web and via gift cards 25% more than ...

Roblox players can now snag more Robux when purchasing the in-game currency on select platforms instead of on mobile or consoles.