Hello,
Sorry the Steam Key feature is a built in feature that Itch handles but Itch does not include Steam keys with games if they were obtained through a Bundle like the Bundle for Ukraine. If you'd like a Steam key though just send me an email at sales@walkhomegames.com
Include a picture of the email receipt you received from Itch and just make sure it includes your user name so that I can be sure it is your receipt.
You can block out any other personal info, I just need to know that it is your receipt and it is for the Bundle for Ukraine.
Thanks,
James
Walk Home Games