Is it fine to submit runs playing on a playstation 5. There is no PS5 version of the game so it's still the PS4 version of the game, I just want to know if playing the game on PS5 is allowed or not.

There is no reason why it would not be. its playable officially on that platform.

Sweet will download it and attempt some runs. Will I just submit runs with platform as PS4 then as there is no PS5 option.

missing platforms were added.

Thanks