Welcome to the community, @Scott_Mertens !
Sadly & unfortunately, this is one of the many limitations in Airtable.
Airtable will only display your primary field on the calendar, so your only option is to use a formula as your primary field.
So, you could move your Unique ID into another field, and then change your primary field to become a formula which combines any of the other fields that you’d like to see on your calendar.
I wish I had better news for you! Airtable doesn’t normally listen to user requests for product improvements (which is another sad & unfortunate thing about Airtable), but you should definitely send them an email message at firstname.lastname@example.org to request this feature.