The PS5 does support many different Keyboards natively. I use a Logitech K270 which has a single USB to connect both Mouse and Keyboard at once and it works on the console. Call of Duty Cold War has great support for both Controller and MnK and detects the keyboard if I use it on the PS5, changing the UI instantly to acommodate for the input method.
I hope the game supports MnK on console at launch aswell, as I prefer it instead of a controller on this type of games.
