As the title says, the email never arrived - it is not in my junk/spam. Itch seemingly had no option for me to have the email resent (it just says to check my email there) when I was checking last night, but the button showed about 10 min ago and I tried again. And again no email.
This may or may not be related to itch allowing me to buy they game twice (previously as part of a very large bundle that did not include steam keys, the backlog is real, I didn’t even realize I already had this).