Date_added in Campaign

Your software
My Mautic version is: 3
My PHP version is:
My Database type and version is:

Your problem
My problem is:
It’s very basic. I’m trying to create a campaign that has a decision based on the date_added field of a contact. I know the field is there, as I can make it appear in the E-Mail I’m sending. Is there a way to integrate this field to the campaign?

Here are the fields I’m able to select:

Thanks for the help!