@BeAware Yep. Had to jump through some convoluted hoops to add the PS5 version to my library.
(copypaste of the instructions I gave elsewhere)
> On your PS5, view the game in your library. Click the 3 dots next to the title and pick "View Product". In the lower-left corner there's a "Game" dropdown. Pick the bottom "Game", and there will be an "Add to Library" option. Add it to your library, then you have access to download the PS5 version.