I, along with a number of other people, were missing the PS5 version download after purchasing the deluxe disc version. The download code gave you the freebies, but not the PS5 version of the game. If this is you, check two places:

  1. click options when you have the MLB The Show tile highlighted on your homepage, go down to "Game Version" and see if there is a PS5 option.

  2. If there is not a PS5 option, go to the PSN Store and go to MLB The Show 21. There may be an option to either download or upgrade (don't remember the exact wording). I was checking this daily since the release and last night, the PSN Store gave me the option of finally downloading the PS5 game.

I did not delete the PS4 version or the tech test before going to the PSN Store