Allow Auto Number to be included in Email Automations

I manage a parking waitlist in a specific group in one of my boards, and I am using Auto Number to calculate/show the number in the waitlist. I get a lot of questions from people about where they are on the waitlist, and I was hoping to set up an email trigger based on a specified date and use Auto Number to send an email communicating to people where they are on the waitlist. This would save me a LOT of manual responses and would add a nice layer of transparency to the process. Unfortunately, Auto Number does not seem to be a field choice when building an automation. Please vote to get Auto Number into email automations!