I purchased CrossCode and have access to 4 downloadable files (Linux 32bit, Linux 64bit, Mac, Windows). The game page and purchase pages say Steam key is included with purchase, but I cannot find a Steam key listed anywhere on the download page after purchase. Any assistance with this would be appreciated. Thanks!

Greetings!
That sounds rather weird as Itch takes care of the key distribution and we did not run out of stock. It might make sense to contact the itch support here if the Button for the Key Generating does still not appear.