The person who found no indication of keys would then have found a steam key claim that simply says "There are no keys available at this time, try again later" when clicking the button, instead of nothing. Additionally, attempting to buy the bundle currently clearly says no steam keys, which it didn't before :
But again, fair concern, you're right to wait, and it's rather unfortunate of itch.io to make the mistake and then not reply to you.
Good luck with this! And with your future games, you make pretty cool stuff =)